Well under the old version of the rules it was unclear at best what happened regarding amendments and final vote motions. For instance, could one introduce a final vote motion if an amendment was still actively pending? And if so what happened to that amendment? The rules said that if the Chancellor did this it treated such amendments as failed unless they were being actively voted on, but left it ambiguous for a standard member. The whole "you can't offer a new amendment when a final vote motion is pending" was more of a Speaker's Announced Policy than an actual rule, I'm not even sure it was 100% consistent lol. And in most cases people just withdrew the final vote motion if there was an amendment to be offered anyways.
Then the way to do it is to say that no amendments proposed
after a final vote motion can be considered, while amendments proposed before a final vote motion can still be considered.
As I've told you several times, there was no opposition (thus members of different parties shared slots) for much of the 9th and 10th councils and clogging did not result. There may be a justification for GLRP style federally, but it seems not here. Regarding the seven slot system, the old 5 member Council would have filled that up at times, so definitely too small for a seven member body, particularly when restricted as you propose.
I don't see anything wrong with being cautious and the slot division method has worked just fine, I'd keep it, I don't see the need for this free-for-all type system.