I guess I will write my thoughts also. I wasn't here for first season so this was my first take on seasonal, but I am not new player also, I was playing around 2018-2019 and then had a break from, game, so I jumped in with two years old code. Overall I did surprisingly better than i expected (got 16-th place).
Place brackets was too wide for my taste (mb cause of that was, that there wasn't too much player competing), but around beginning of second month I figured out that I have no chance to get into top 10 (at least with time I have on hand for codding), but in the same time I was pretty sure I don't drop bellow 30 place. That caused I started to lose interest in fighting for better place. I wish there was more incentivise for fight for each place.
Highway walls was pain for working with, but I liked it. My code for getting around them was crappy, but that was mostly because i had more pressing issues with my 2 years code that I was in need of fixing. I don't mind if for them to be in next season, and i even want them.
I liked gathering score, and overall it wasn't too hard to get it started, so I think it was easy enough to start getting them for more freshly players.
As Tigga said, boosting was problem this season from my perspective. As player with no alliance or in game friends it was hard to compete for high places.
I was missing market. I know it was for better to disable it, for above reason, but maybe enable it to trade with "npc"? So you can trade resources that you have too much for more needed ones. It sure should be balanced, so there is still better to plan rooms for mining desired resources, but at least you could have something to do with all that oxygen and hydrogen. Also, you can transfer that code for persistent server. Also, factories would be more viable that way.
Not much feedback but i want to share also: yea, Tigga was extorting me, but overall I didn't end to badly with that barging compared to players that got totally wiped out and needed to respawn. I think it was good deal for me (I didn't have chance to fight since my war code was pretty non-existent at this point of game). I even enjoyed it somewhat (Stockholm syndrome? xD) I think it can be nice addition to game, but to that happen, big players need to have harder time to control large spans of territory.