This may be a silly question and maybe I'm missing something about these changes but I'm finding them sort of tedious.

Is there a way to tweak (or even revert) in-game, the changes to Sieges and Supplies?

I get that sieges and supplies were changed for balance as the fortifications could be so overpowered, and the supply/defences system is sort of half-baked as it is. The human player is always going to be smarter than the AI but the changes seem to be so extreme and nonsensical.

I have just defended against an AI attack though, and I could build a total of two defences, a tower and a barricade for example. The towers are weak enough to be almost useless and the barricades the enemy can easily avoid because there's only one or two.

In the last 4 campaigns I've played (different factions) I've never had more than 1000 points to spend regardless of tech and upgrades and now it seems I cannot move defences or reclaim points by destroying them either.

Conversely, I assaulted an enemy major settlement and they had 8 towers, and 12 barricades. They seem to be able to build new ones too. The result was a long-ass slog of a battle with my 4 stacks barely managing to break through. I'd be okay with this if I could add a few more defences to my own settlements.