So, since I still love this game to a reasonable degree, would you say it's best advisable to restart right now on DMM right now, or wait for this reboot / english version / whatever?

There is a nice guide with translations and whatnot in the MWA wiki for restarting in DMM.

Also... the DMM version will not be closing in the foreseeable future... right? I don't think I can handle this closure twice... ;0;