There should be much more (or only) spawnpoints inside the castle at the beginning of the round. Else attackers are able to rush G and if you have no one who's able to open the gate or door from inside, then the round is lost in two minutes.
1. Changes to Defender Spawns
Defenders now only rarely spawn in the front bailey (at flag A), but more spread out inside the castle. This should help with them being involved in fights outside the main castle and make it easier for Attackers to capture A, while making it harder for them to sneak by. Defenders still can use the door to the outer bailey and defend A of course. So there should be some intense fighting happening, but not as one sided as it was. A nice side effect on that could be that the ram now reaches the gate more consistently without getting overrun.
The new gate that you added in to G makes stealing even worse, as the attackers will just close the gate and it is unable to be opened or destroyed by the defending side. Gets quite annoying but should be an easy fix.