Long ago, when ‘the F2P bracket’ (20-24s popped, 29s rarely so) used to be 20-24 and 20s had like a 10 to 30% or more miss chance against 24s, that also further motivated solo F2Ps to go hunter or other FOTM classes, especially when hunters had a lower miss chance vs higher levels than other classes (since their attacks weren’t affected by dodge until a much later expansion).
This new change (F2Ps/Vets merged to xpoff 20-29), when BiS 29s become a more consistent presence in bgs, imho may motivate more solo F2Ps/vets to go with more FOTM classes to ‘have more of a chance’ (if BiS 29s become too strong relative to BiS 20s, though time may tell), or may opt to not queue and enjoy the much larger and more accessible PvE world outside battlegrounds.
Although many or most have rolled FOTMs already before this change, so the above idea is moot anyways.
At least F2Ps have PvE routes for their BiS gems (a grind for sure, but at least a deterministic, little RNG to deal with grind) and classes that can buy good gems for marks of honor can do those PvE routes as an alternative if marks of honor become trickier to farm due to 29s (time will tell if that actually becomes the case).
If history is any guide, xpoff 20-29s will pop with reasonable queue times. Queue times back then were around 5 to 30 or more minutes (and varied by time of day). Time will tell of course.