PPM sabotauged by their own Procs in ATOs?

It will effect yes but it won't effect it too much. For an example I have whole gaussian set on build up and still i can say that it is proccing almost everytime. If it is a power that has too much recharge it won't be effected much because of %90 chance cap. If it is not however the recharge buff of a single slot will effect it less too so change would be less than %10(for example instead of %60 it will be %58.76 or %56 but no less than %50 and probably more like %59.40).

For a more real example; I used golden dragonfly power as an example for brute ATO. Brute first ATO sets fury bonus has a ppm of 5. This means it fires 5 times in a minute at tops. Golden dragonfly has a recharge of 12 second so it has a (60/12 = 5) PPM/5 times chance of triggering proc since brutes fury bonus is 5 PPM it means it has a chance of 1/1 (in other words %100 chance) to trigger proc but becuase of %90 cap it brought down to %90 (0.9) now according to mids if I just put brutes proc into golden dragnfly it has 9.74 second recharge time. After making calculations it shows a 0.81167 in other words %81.167 chance of triggering proc. It dropped triggering chance yes but in previous stuation you actually had 4.5 PPM (0.9 triggering chance with 5 times in a minute 0.9*5=4.5 triggering proc in a minute) now you have a little more than 4.8 PPM ( >=0.8 trigger chance with >= 6 times in a minute triggering 0.8*6= 4.8 actual numbers can be closer to 5 PPM)