Construction waiting times are a too long. You get punished a lot for defeats (to the point that it's better to leave a game if you're not 100% sure you'll win). Would have been quite an enjoyable game if you could progress at a reasonable rate while playing it.

You need a few upgraded Primes for PvP. All the robots below that are trash in comparison. That means several years (literally) of watching ads and gameplay to make up for real money. In the meantime, you'll be farming AI bots.