Here's a few of them:
You've missed out The Isle Of Wight, to which has Carisbrooke Castle situated in the centre of the seven valleys. It has traces back to roman era, and became a fully fortified castle around the 1100's under Richard de Redvers. And it still stand today even though encountered many a siege by the french (and in good condition).
You've not included Malta, which was an island of great importance to Sicily, muslims and the byzantine empire during the medieval era. To which was a practical trade port due to the islands location. (Then was given to Knights Hospitaller in 1500's :3)
You've not included Rhodes (city & island scale), which has a long period of power struggles from byzantine, even though it was closely regarded as an important Byzantine trading post and stronghold, and not to mention fertile soil for growing good produce.
On your scabbards, I've noticed that you don't have a pointed mouthpiece, which was all the rage in the 13th C. (Don't know why protecting a bit of your quillons with your scabbard was, it just was.)
On most of the utility belts, you only have a pouch if that, in the 13th C. they always carried their own cutlery on the utility belt (even been references of soldiers still carrying them into combat). Though on your virtual tapestry artwork, you have them and the famous Bread Knife which is absolutely lovely
The Knights Hospitaller had one of the most disciplined and well trained troops, equip with the finest gear available and all being issued with the clothing and armour they required, which they were one of the only orders in that time with a uniformed Order. Once you were given your kit when you joined, it stayed with you until death; and then passed on to the next; you never owned any of it, just loaned. But if a 1240's cappa still had a small cross on it, and this was 1250's; the squire would remove the small cross and put a large centred one on it for the new knight.
A Brother-Knight-At-Arms would wear always wear a cappa (See K1), with a centred eight pointed white cross. And would not a Surcoat. They also wore Transitional Helms (Which there is figuratively none in the mod). Having their Utility belt to help hold up the cappa and relieve some of the weight of their hauberks, while their sword belt obviously only held the sword and scabbard. They wore three layers of protection; A Gambeson, Aketon and (Full length) Hauberk. And Mail mittens, Chausses, and coif for limbs.
K1: They obviously didn't wear the cappa to sleep, they wore their undershirts or nothing, really personal preference. And also when they weren't armoured up they'd be in their work tunics, which were a black tunic with eight pointed white cross on it, ending at the knees, with sleeves.
While Brother-Sergeant-At-Arms would always wear a Surcoat, with a eight pointed white cross (See S1). And also wore a kettle helm, but never a transitional helm (See S2). But other than that, they retained the same armour as a knight.
S1: Now, 1250's was the changeover from all wearing cappas, to knights & Priests only. Before 1250, it is assumed to identify a sergeant they always had a small white cross on their cappa, as well as different helm to the knights, while knights donned a large centred cross in transitional helms. So the new men would definitely wear a large centred cross of their surcoats, and others would keep their small white cross on their left shoulder of the surcoat as a sort of sign of respect and times. And did the same with their shields.
S2: The thing is, it's bloody hard as there are so few surviving records of sergeants; but what from we've got we can see that they didn't wear transitional helms, but kettle helms. Of course some of them would have only worn their mail coifs, as Kettles, mail and coif is alot of weight for your head. And also makes you very hot; so a few of them could have fought without them.
One thing that did bug me, was the Heater Shields that are used by the Knights Hospitaller, you've obviously just done the heraldic ones, but they never used their battle colours on their shields Until the reformation of around 1300s. Insead they'd use black with central white cross (Again see S1).
On your lances, they also used alot of pennons (Not swan tails (double pennons) often for royalty) instead of the big flag that could rival a standard flag. And also, would probably be beneficial to swap the lance banner to the other side, as most of the time you're trying to hit something or couch it, which would make it look more normal than an upside piece of cardboard
Or potentially make it droop down so it looks like theirs no wind, and when you go to hit something it also looks like it's being blown by the wind.
Brown Cappas... That bugs me more than a cat hugging a dog. They believe a brown cappa was actually a faded black one, as in the Knights Hospitaller records there is absolutely no mention of a brown cappa; not even for our priests.
That's all I'll list for the moment. Sorry if it sounds like I'm being one of those annoying idiots