The tick speed hasn't been fixed yet. The cacti is still growing slower than it used to. As Julian already said, if you think that everything is alright, try throwing some XP bottles to the ground - they drop like 3-5 times slower. Same goes with buckets - you can't pick up lava as fast you were able to. This issue really ruins skyblock. How are new players with smaller farms supposed to make money when you have to wait 10 minutes for a pumpkin to grow? I hope this gets fixed ASAP.
@Eyeless_Tenshi, sometimes you have to do something over and over again to reach your goal :) (it's a rephrased quote, can't remember who wrote it)