After being reset twice(22-0)(14-0) I was finally able to complete the regular easier solo seasons mode. 31 games total with the last one being against the Rams in the Superbowl and being down 10-0 to start the 3rd,the only game where your down in all 31 games. The games are pretty easy and the CPU sucks. You get 3 redzone packs for winning the last game. I know in total you get 10 packs from the 31 games and only 4 or 5 redzone packs in total and 3 are from the final game. I did end up pulling 3 80's and a few 79's and high 70's players.
I enjoyed solo seasons but unless they revamp the rewards down the line it wont be worth it to play 31 games for 10 packs and some 70+ ovr packs as cards lose value. The main difference between the two solos season modes seems to be that in ultimate SS you start the game being down a certain number of points after the 1st game but that mode only gives you a total of 15 packs with just a few more redzone/midfield/hailmary packs. I do think SS is a good addition to MUT and is a good easy way to build some coins and get some packs and I have enjoyed playing it even though it's pretty easy even on Legend and HOF tiers. If they update SS throughout the year then that will be a big W but im not banking on Ea to do that.