Didn't he get a new set between 4&5? I liked his 5 armor for sure.
Yeah he went from Gen 1 Mark VI to Gen 2. But I think OP is lumping them together since the art style, ergo the suits, is so similar.
For me, I didn't like it. But to be fair, I really don't like the whole art style change between the OG trilogy and H4/H5. The armor makes the chief look like a giant brick compared to his more sleek appearance from before. I know that the Chief is a giant brick of a human being to begin with, but going from a smaller suit of armor to a bigger one feels like a step backwards in technology. Kinda like going from an iPhone to a Nokia brick phone. As a general rule (not necessarily true across the board), better technology means smaller. This can be seen in Moore's Law
. But beyond the size, the armor went from a focus on the green harness and plating to the undersuit, which made it feel like the new armor was mostly made up of an undersuit with the armor pieces just sewn on.