I've been successful as 1H cav whether I use a 64 length Steel Pick, a 103 length Paramerion (Shashka), or anything in between. I've also been successful as cavalry if I pick up a Morningstar with 1 WP in 2H. I've also been successful as cavalry if I pick up a lance with 1 WP in polearms. I have done this in Strategus battles when my team has been getting rammed and is out of 1H weapons, or very low on them, and I find that I get similar if not better KDRs using polearms and especially 2Hs like the Morningstar. The moral of the story is: stop nitpicking, 1H cav is not easier than any other type of cavalry. It just takes a marginally different play style.