Re: Arena power disparity
I can confirm what @lkbroach said. Playing off hours can trigger so lower opponents. The - 5 is not the end of the day. I have 102 defense after boasts and still see 98s that are are - 5 move the ball at will. I had a 93 player, also minus 5 drop 2k on me in overdrive last month.
I would definitely check your boast set up. When I was sub 100 Offense, I boasted OL to help buy time. I run vertical now because I have faster WR and better O-line. I ran Spread before that and found lot of PA plays that worked.
There are tons of high level players for cheap right now on Auctions and you can get 99+ fairly easily in the current prono.
Just keep grinding. You will take some beatings, like I still do against even better teams than mine. Also check out Madden Mobile blog on reddit. Tons of great info there.