>>96333031
Footslogging cataphractii were never viable
The reposition reaction in the movement phase is strong, but with a land raider and moving it's less of an issue. A 4" reposition is very strong in a vacuum, less so in a world where objectives, terrain and other units exist. You still get your setup move (which can be buffed, even on cataphractii) and charge roll.
The evade reaction in the charge phase is light or cavalry types only, so most cataphractii targets won't be able to do it at all. This one is significantly harder for heavy types to overcome, but will be rarer.
None of this counts if you're playing against a White Scars opponent who can just move their full movement in response to anyone with the audacity to end their movement within 12" of them.