New Units and the Effects on G.R.I.D

As the devs keep introducing less content and more units does anyone else feel like the game is becoming more and more pay to win? I’ve been playing now for almost 4 months now as a F2P (not long) but seems like my units are increasing in levels simultaneously. To me it seems, the only way to bypass this is through the G.R.I.D, but as I pass on unwanted talents and stars the less I see the mini’s I wanted to spend on. I think it’s about time the G.R.I.D gets expanded to 4x4 rather than a 3x3. If all that’s getting implemented is new units than it feels like new players and low spenders will always be playing catch-up when it comes to obtaining first epics, legendaries, etc. Kind of a vent but anyone else agree?