problem with your third point is that it effects casual play too, no one wants to play a game thats stuck in one meta for an entire year, imagine if we had tejo postplant meta for the entirity of 2025. its not even that much better for pro play anyway cause then people would just say, "oh X team don't deserve their trophy cause they just abused the meta that year." i do think that they shouldn't have meta shifts right before a tournament, like in toronto where the teams who perfected tejo meta qualified, only for tejo to get killed and leave every team besides fnc and prx stranded.
anyway about your the snowball thing, i agree. i think a good idea would be to have the ult orb spawns change based on who's in the lead. if both teams are within 2/3 rounds of eachother then they spawn normally, if attacker team has a lead of 4+ rounds then orbs spawn closer to defender spawn, and if attacker team is down by 4+ rounds then orbs spawn closer to attacker spawn. ults can already act as a comeback mechanic, but at the moment they can be just as much of a snowball mechanic, and i think this change would make them lean more towards a comeback mechanic.