SoloQ - Soulwell and Refreshment Table
Now that Soloq are cross realm it is harder for Mage and Warlock to provide healthstone and food to Arena Partner because it is impossible to Trade with players from different realm or opposite faction.
For this reason, as quality of life additions, I suggest to make automatically spawn a "Soulwell"/"Refreshment Table" whenever a warlock/mage join the Arena (just like it was on Old AT Core).
Yes, it would be a custom feature but, since you guys have been so brave to introduce SoloQ on Icecrown/Lordaeron, I guess this should not be a big deal.