Infraction: 6. Do not post unless you have something new and worthwhile to say.
Message to User:
If you're going to add something to a discussion that took place 5 days ago, at least know what the hell people are talking about first.
A few moments of testing confirms your findings Consider, I removed all gear except a basic weapon (no runeforge) and a greatness card. I waited for a proc, applied both diseases and then refreshed once greatness was down. Every time without fail the diseases used my current AP when I refreshed. It would appear that the functionality of GoD has changed.
I cannot confirm this. When I refresh via Pestilence when using Glyph of Disease, my current attack power not is used; as expected, it uses the tick strength already on the target. Moreover, any disease applied to secondary targets is applied at the strength of the disease on my current target. This means, for instance, rolling a strong disease on Anub'arak will push the strong disease to the burrower adds. This is a very significant DPS boost, even with diseases being reset every burrow.
I tested both in normal raid gear (with proc'ing trinkets, set bonus, sigil, runeforge) all up, refreshing after all fall off, with damage remaining. Likewise, I tested naked and using only Icy Touch for Frost Fever and Horn of Winter to change strength (easily applied and removed). In every case, rolling diseases retained the same tick damage regardless of AP, and always renew at the strength they were applied (with adds getting the disease at the strength of the target, not based upon your current AP).
Were you testing on the PTR? I did my testing on live.