I really like this game and I've been playing it off and on since it began. Like 95% of the changes made to this game were great or just really made sense, but this is one of the things that really grinds my gears..
Fuel Cost for upgrading: The -% fuel cost of upgrading/crafting items used to be able to go up to 99% which was really cheap, I'm ok with the -% fuel cost cap going lower. However, leaving the -% fuel cost cap at 80% is INSANE for most players with a uni or premium weapon they want upgraded. I know that this is a good way for Con to make money but like 500 fuel with all boosts to upgrade a lvl 50 unique one level is taking pay-to-play to the next level, that much fuel would take a few weeks for the average player to gather. I suggest a -90% fuel cost cap to make it somewhat affordable for the average player. (I know that there are uni tokens but seriously those are very hard to get)