The system of getting new content is indeed being reworked at the moment. Meanwhile, new Weapons and Mechs that are no longer added to Progress Path, appear in the game events, in Special Offers, and later in A-Coins events. As per our latest "What we are working on" publication (https://plarium.com/forum/en/mech-arena/854_news/31430_what-we-are-working-on-04-21-22/), we are planning to launch the A-Coins events more often and provide the most asked for content as rewards in them.
As regards the spammers and violators in the in-game chat, our team is working out a proper way of monitoring the chat. While the violators are being constantly banned, unfortunately, the spammers keep creating new accounts, however, our Support Team keeps an eye on it.