Well this is what I would do. They need a noob bracket for PvP. Players under 20 should only play with other under 20 players. That way new guys are not just becoming stat boosters for those of us who have been here from the beginning.
I also think that the gaining XP due to events and updates is going to have the side effect of giving players artificial rank. This is a complex game with a lot of nuance. When people see those ranks they assume a certain amount of experience but due to these boosts they are throwing people in the deep end that may only know how to tred water.
Regarding your idea
I also think that instead of boosting player level maybe the minions get hardened when the first sentry goes down. Also increase the spawn time of the winning teams thrall. That would at least buy the losing team some time. Maybe do something with the spawn time based on level. The higher the level the longer the spawn if you die…
I dunno, it probably would just drag out the inevitable. I don’t think you can fix everything though. I think this game is on an unavoidable path of niche hardcore players. It just isn’t new player friendly.
It funny I had a debate on here the week this game came out on this forum that this would happen. That it’s not as accessible as overwatch. The other guy disagreed. I think won that one.