Game Balance and Matchmaking - We want your feedback!

First off i am no expert here just giving my thoughts. 

1. Is it just me or is the gdi turret last way to long, I mean you can set that bad boy up and it will never die until you have sandstorm it seems. I also hate how on certain maps it acts as a force field. It cuts off one path and you can try to break it down buts it its like hitting you head against a wall when you can just go around it. 
2. Next thing to bring up is how to get unit cards. Why cant everything just be unlocked right away and the player decides what to level up? I would rather see a player decide what play style they want than have RNG tell them what units they can have. 
3. My next is to describe a few issues i am having mainly killing sandstorm and titans. They both seem invincible right now. You literally sac units just to get damage done it doesn't matter if it is technically a counter or not. Also the orca seems a little strong the mobility it has to unmatch to anything rn. This unit can basically be stutter stepped and it never dies, and when it does it already killed so much you have enough to remake it. 

This last point is a little selfish. I really dont like the level up system on units or the unlocking in general. I come from a lot of SC2/SC background and the worst thing is not being able to play the way you want or having units locked until you get a RNG loot box to actually use them. I would rather see everything unlocked with pre-determined dps/health/movement/etc. In regards to commander abilites they all seem to last to long imo. Maybe is just the way I play and am bad idk. This game has potential but if you keep the unit leveling and RNG unlocking it wont do well in the RTS community. 

PS: how do you get a second harvester, is it off of commander level?