Hi, I'm an old returning player, I tried playing the game on my old account again but everything seems terribly wrong for me.
Upon login I appeared as a lvl2 player so I started leveling on pve but after a fight I got to lvl14 and on the second fight on lvl23 (which was probably my actual level the last time I played). I still had my old equipment though most of it was lower lvl now, still that is probably to be expected. After trying some pvp I realised that having an old piece of equipment on my mech would cause my opponent to lag and pass their turn without taking action. It was possible to win fights this way till the opponent quit, getting rewards, pvp points etc. If I had money for new equipment it would have even been possible to keep just one "old" piece on the mech and fight normally while all my opponents lag (I know, I should have just kept my mouth shut, right?

)
One more thing, I didn't seem to get a money bonus for leveling from lvl23 to 24.
I can still play normally on pvp (pve is fine) by leaving all my old equipment aside but I have no money to buy everything new at my level. I cannot remember what version was the game when I last played but perhaps it will be possible to find out from my account history or something? Some old achievements are still there.