In my opinion a lot of these suggestions get crazy way too fast. Two simple changes that could be made to incentive pushing (which seems to be considered the key goal) would be:
1. After being capped a point takes less time to cap the next time (there is a limit on the reduction, maybe 50% after 3 caps or something). This makes it easier to push out of last or onto mid.
2. Respawns are faster based on cap time your team has on the point that you're trying to push.
Now I don't know how well these would work in practice and I only think one should be used, not both but I think that they are worth thinking about. They're easy changes that wouldn't need new maps or weird ramps from the heavens.
I think that they would incentive pushing and the first could lead to some very back and forth games.