OP said nothing about purchasing anything. Re-read it slowly this time.
My problem was that your post was inherently negative while also having nothing to do with the OP's post.
My post is negative because there is nothing positive to say about the way RLD is handling the PC version.
Furthermore, no one can give OP solid advice on what to do because no one knows what to do. Grinding for HC, or spending cash on MC could be a mistake and / or a waste of time if some day in the future RLD changes their mind with the way the PC version is balanced. Perhaps the PC version never takes off and OP just wasted his time and money. Anything can happen, did anyone expect the PC version of Hawken to be playing second fiddle to a bunch of console versions? lol Exactly, use caution folks.
The only sensible advice for OP is, if he is enjoying the game to keep playing and to unlock things naturally via progression. I wouldn't go wild grinding, or spending MC because there is too much uncertainty with what can happen next (PC version). I'm of the opinion the PC version is not the lead platform for a reason, and the PC community should accept that and not recommend that people should be buying all the content for some future proofing pipe dream.