hello again
i was thinking about this a short time. but it should not happen, and i can tell you why:
bots that do not use energy are a little bit overpowered, no question. it would be "the end" of the upgrade line, the very last tier. but where should the last tier be? i introduced tier5 a few days before. maybe there will come tier6 in a few weeks or months? :P
anyway, the higher tier bots are not just way faster, they also consume less energy