i am really glad you liked it and the praise means a lot to me, as for the purpose of bipedal mechs i'd have a differing idea (though, this design was more of a "mod" on the crawler val uses)
flankers, the main point of the biped mechs would be 3 dimensional combat like a sort of bridge between a tank and a helicopter. the point of the legs in that sort of a design would be not to facilitate walking but to survive the landing by breaking the fall (think of them as more built like ostrich or more generally bird legs). i've been toying around that idea for a long time and i thought about those designs for a long time. i can send you the latest one i am working on trough some sort of a dm, i don't particularly feel comfortable sharing that one to the open.
thank you for your encouragement!, i'll work on this one and post more about the arms :D.