Now that recruiting is in-season, will 1-day worlds have more recruiting cycles than the 2-day worlds? Or will the cycles be longer? Or will the number of days recruiting happens be shorter?

That's actually a good question. I believe that the time for recruiting in one day worlds will be longer, at least for the in season recruiting.

Not sure if this answers the question - but here's the time line under the current beta world (season 3), which is a 2/day world.
7/22 - scouting started
8/2 - recruiting started
8/5 - signings started
8/7 - recruiting period 1 ends
8/17 - recruiting period 2
8/19 - recruiting period 2 ends

One big change will be cycles are going to be processed every SIX hours instead of 3. Today I asked on the beta forum if 3 hours would be re-considered and he said no... so I think 6 hours will be permanent.

There's really no reason for it to be longer - that would cause problems as attention points would accrue more for 1/day world teams. Why couldn't it just be the same number of days? Sure, less games would be played during that time compared to 2/day worlds, but does that matter?

I would prefer the extra time to scout.