With the caravan "exploit" i can just take over the entire map in a couple of man hours, just refuelling at "merc stations". I just don't become attached to my men like in warband at all as they held no value. I remember producing an elite amry in warband, and was so upset when i lost a knight becuase of the work involved training him up. Now i couldn;t give two hoots they're just dispoable.
I hate the merc system, they're just too cheap - they need to 10x there cost, and for emergency situations only!
and/or i'd remove the upgrade equipment option, instead reserve that to your basic faction troops to give them a purpose.
I'd love to see a warband faction style of recruitment tree, but to include the recruit, experiecned, elite statuses too, sometimes you want cheap front line soldiers to you should be able keep them foot soliders but progress them through the rank system (elite etc)
I'd keep the city commanders for extra special order troops only (i.e scotish units only available in certain cities, german in others etc), but again make it chargable.
Just my thoughts, as im finding f&s much less involved, with no attachment to the ingame characters and armies it loses its emotional aspect.