I agree it should not exist, but the way things are currently implemented that’s what our reality is.
Ideally, what I’d like to see is the following for the arena:
Once you unlock a particular arena you can choose that arena, or any below it you’ve previously unlocked, to receive those rewards for the next immediate fight.
What I’d like to see for matchmaking:
Teams are locked to include dinosaurs that are only 3 or so levels apart from each other, and then matched the the closest averaged equally-leveled opponent currently looking for a fight. Granted, this might make matchmaking take longer, but it might also be offset by the fact that this might be appealing enough to get more people into PvPing at any given point in time. It also means people can’t upset the average (i.e., using that level 25 Indoraptor along with a bunch of level 10s in order to stomp smaller people).
What I’d like to see for trophies:
While trophy count will progress to unlock arenas and will still matter for tournament rewards, they will be based on the current trophy count. That means that I can progress and keep gaining significant trophy count while using my themed level-12 sauropod squad, or I can go entirely legendary for more strategy, but I progress without having to spend time to intentionally reduce my trophy count and drop arenas. My trophy gain will then be increased against higher-rated players and be reduced by newbies; the only “stomping” of newbies possible will be through skill alone, because the dinosaurs used will be still on par with one another. I.e., I use my level 12 team and fight two other level 12 teams and my trophy count is, say, 3500. I beat the other two teams. Team 1 was only rated 1200, so my trophy gains are relatively low, like 15-20. Team 2, on the other hand, was rated at 5000+ so my trophy gains for beating them is something like 40-50. The losses would also be somewhat comparable; if I lost to a higher-trophy opponent I don’t lose as much, but if I lost to a newbie I’d lose a significant amount. However, because I can play based on creature level by choice, there’s no reason for me to intentionally drop arenas.
What I’d like to see with rewards is simply greater reason to keep fighting if my four incubator slots are full, especially with these changes since we need more people in the queue at various dinosaur levels.