Something that has confused me about pikemen is that they seem to lack much ability to get through full plate armor. It makes sense how they could easily bring down a horse, but couldn't dismounted men-at-arms have used poleaxes/zweihanders to knock open a path through the pikes, and attack the lightly-armored men behind them?
Hi, always more to be said on this subject but you might be interested in this this recent answer https://www.reddit.com/r/AskHistorians/comments/7ognxi/what_happened_when_dismounted_menatarms_in_full/
If two-handed greatswords ever were intended specifically for breaking up pike squares they don't seem to have lasted long in that role. Usually when they get mentioned it's in the hands of troops picked to guard the standards in the center of the square or mixed in with the other short weapons
Please let me know if you have any follow up questions!