Why do you keep adding modes? Majority of people wants beacon rush and domination. Polls have been made and results are clear. About 10% of players prefer new modes. And you "collect data"...
You say there is not enough population to fill the modes(and thats a whole another story), and yet you keep adding modes. I get that you want people to get specialized hangars and to pay up, but no honest way to do so unless you throw stupid amounts of cash in. And from that we get new( actually old) problems.
Risky things you do...

Done. Now you can respawn for gold in ANY mode.
It's all about sustainability afterall...

Taran bug? And what the hell happened to Orkans in 3.9?

So something comes out which i finally really like and would see myself building.
First two months it is inaccessible, let's be honest these prices you have are absurd. Then i build the mech lets say almost a month, because i also got maybe something from chests or maybe even bought that
last piece.
I don't freeload. I pay. In reason for occasional deal. And monthly payment of course or otherwise you can't breathe in higher leagues at all unless you playtime is unreasonably high.
So. Almost a month has passed. Now the weapons which i need multiple. Add another minimum 2-3 months. In this time i can already upgrade the obtained crap. If i have the silver. The time needed to upgrade is 2 times higher than to obtain. 4 items - 8 months(10 months for Spectre for instance and 20 months to mk2 it). So i am not a complete duuki and rush some upgrades and shave off two months...
So in total a good build takes about 9 months to build.

How big is the percentage of of players who play just stupid amounts of time or spend stupid amounts of money? Sustainable enough?