What is Roshi gonna do in that ?
If they send everybody to Whis' dimension, we can easily suspend our disbelief when Tien takes out Frost or something.
As it stands it's not days in the chamber that will make us tolerate Krilin level to overcome Buu tiers enemies.
If they were all exposed to the god dimension I guess it would be more acceptable.
That's easy for you to say, all Gohan has to do is sit in front of the kai for 28 hours .
I'm more concerned about 18, Tien etc...
17 is fine since they can come up with any excuse they want "off screen".
Seems obvious they're thinking about how Krillin would stack up against Basil in the NEP so again, hopefully this means some sort of preparing.