Hey all : ) Thanks for replying to my thread and at least trying to discuss this.
Let me give a little more context on why I think this is "critical" and not just "a small change".
Back in BC me and my friend had what we called buff bots (they weren't bots), there were max level characters on a separate account which were used for nothing besides buffing our characters before battlegrounds. Twink are about pushing the limits and maximizing your potential, and hopefully pushing it further than anyone thought possible! Thanks in part to those buffs my 19 rogue was able to do only die 1 in 3 games, I carried all 3 flags about 1 in 3 games, and won most of my games while queuing solo. Queuing with a premed felt too easy so I rarely did it.
Now fast forward to my current plans for thinking, I'm a lot more skilled with numbers than I was back then I'm poured over the buffs possible and found all kinds of fun things!! Suffice it to say an estimated 2/3rds of my estimated best in slot power comes from the 11 planned level 60s, the BiS gear adds another 1/3rd. You might be thinking that's crazy, well it's not as wild as it sounds fun buffs like Dampen Magic at max rank can almost completely mitigate all incoming magic damage!! (At the cost of not really being unhealable) (In the level 19 bracket.)
Buffs are huge. Once upon a time Blizzard patch by patch, expansion by expansion hurt twinks, bits here, bits there. A notable nerf was when they did finally nerf buffs into oblivion.
Now Classic is supposed to take us back in time to before all the changes "for our own good". This is a large change, it effects levelers getting buffs in town and thinks heading into BGs. If we let them change this, there really isn't anything to stop them from changing anything else they feel like. Scaling people's level up in BGs is similarly potent today, you'd be shocked if they did that here, this too should produce shock to anyone who played back in the day and fully leveraged available systems!
This change alone quite literally ruins my plans for completely overpowered twinks, and thanks to buffs on enemies not being visible (unless a mage reveals them) it would be extra fun!! And yes Priests and Shamans with dispel abilities would be my worst nightmare ; )