This is really nothing new in games, be it digital like mech arena or physical like TCGs ( yugioh/mtg).

I've been playing TCGs for about 20+ years now and let me tell you this happens all the time.  Older games will get banned or errata'd (a rewrite of the cards effect, basicly a nerf for cards) just so people will buy the new cards and decks that just got put out.  In the TCG world this is just accepted by the community cause that just how the TCG world works.

In the digital realm such as with mech arena I get the feeling alot of the players arn't use to this and as such is where alot of the complaints come from.

You have to realize that these games are ever-evolving, things are goin to change, if they didn't the game would either get stale from the same meta being present for years and years and years or the power creep from the new weapons would be vastly better than the old ones since the old one didn't get nerfed to make room would then lead to every one getting one shotted.

Hello! Thanks a lot for your feedback; it will be considered! The aim of the rebalance is to make the Weapons meet their Grades and Classes, as some of them are kinda out of these borders, which damages the overall game balance. Nevertheless, they won't be dramatic - we'd recommend you to give it a try and maybe test some various strategies and tactics. We designed this Update in such a way that the Content will remain efficient and relevant, but will require not standard approach of using!

i would try new weppons but either i can't afford them, i haven't unlocked them yet, or they're only available for money

Keep an eye on the news, Events, Promotions, and Offers. From time to time, something free or affordable may appear there!

do you not understand he doesn't have the money and most do not want to buy them at super low stars because of the still need for crazy amounts of acoins to upgrade them and the possible acoins needed for blueprints? 

Not for naught, the game is already dead. Literally, they are at the point, they are trying to milk the cash cows money teets for as much as they can. It's a three year old game and 90% AI matches don't lie: they either don't have enough players for full player matching in this "complex" system (where their profit margin is more important than keeping players), or they use the AI to control match outcomes. Neither are favorable to the game content, and at this point, they are just pandering to the 2% heaviest spenders who don't care they spent a bunch of money to only fight AI (or do all the work of matching games for themselves with the same few people), and hope they can get some new player dollars before they realize all the cleverly named AI are just that: bots. Throw in the mix a one way progression system that pushes everyone to endgame and an obvious meta trap (have to buy new meta because they nerf old meta - otherwise, you go back to SuckTown, population: YOU).

I could keep going, but I think we all get the point. Trying to offer another perspective, though...you can't really blame Plarium. If people want to spend hundreds upon thousands in a free game, Plarium is just there to make sure they don't feel bad about it. I mean, it could be entertaining for some to spend to get taken advantage of! People get scammed all the time, and let's face it, the "p2w" scam isn't new, and Plarium isn't hiding it all that well.

Hello! Not all of your statements are true, but I can understand why you are thinking in such a way. Everything is more complicated and complex.

Recently, I received a lot of information about the future plans, and it is exciting. Even if there are some negative points, the game is being developed and it's definitely not already dead. More is yet to come 😉

Which part is untrue; the part were I say, "...you can't really blame Plarium"? I know, that part was added in for levity, haha. While I appreciate you calling me wrong with absolutely no actual information to contest what I said, it's unnecessary. All my observations come directly from the game and continuous, and collaborative, information made by the players, by and large. Also, saying you have "a lot of information" you can't actually give doesn't help your case. No offense intended, I get you have zero influence on the actual game...just...like...the players...

I've already stated that I can understand why you are thinking in such a way. Besides, unfortunately, I can't share much info about the future as well. Still, the development is in progress and after some time, you'll be able to see what is coming