I'm fighting at level 23 right now and saving up for a lvl 33 mech. Once I hit lvl 33 I bought the shielded hull and other equipment, with the 370,000 I had saved up and it didn't buy half the equipment I need xD I'm grinding hard at lvl 23 now, and it is very slow.
At first I wanted to complain, coz yes it's very slow ^_^ Then I realized all I would have to do is buy 770 reds and I could build the mech I want (Might have to do a bit more grinding). I haven't done that, because I don't really want to spend reds. However if I was able to build my mech straight off without grinding, that temptation of wanting to buy reds wouldn't be there.
This game needs it's money

It's not impossible to grind, so yes it's still a free to play game, however that temptation is always there

Very clever I'd say.
I'm not sure I'm experienced. However I got Lucifer. I stopped caring about my win count (as I'd like to buy kits and get 30-40 win streaks) because the cost on kits can be pretty heavy and I'm working on a shielded build.