Same happened last year with the wigan vs cas match due to world club (assuming same with Leeds too), i say leave it, if you're canny enough to think on and want to use some changes, good luck to you. I missed out this week but will weigh up my options when Leeds play their game in hand

Only problem this time round is the short notice of it all.

If you have 3 cats and 3 hull then thats 6 scoring postitions lost as by the time the games replayed everyone will have 3 of each.

Is annoying as I will suffer but appreciate there may be no way round it than to do the same as last year

That's the key point. At least with the WCC, we know about it well in advance, and do therefore have plenty of opportunity to replace Leeds and Wakefield players for round 3.
In the case of Cat - Hull, the postponement happened only after the 'changes' were disabled.
Saying that, I can't really see an easy way around it.

Gutted. Had 4 players in that game. Just call me lucky. At least my brother will be enjoying it.lol

Complaining that the game was postponed is about as fruitful as complaining that one of your players gets injured the day before the match and can't play. It's just one of those things.