Reactive Interface pet change?

I noticed that after the latest publish to game that my pets are doing noticeably less damage now (bots/traps). It's funny... when my bots used to open up on big groups, it's almost like the group literally exploded. But now, it only LOOKS like the group explodes, then I have to whittle them down with other stuff afterwards.

I was doing a BAF earlier today and I really noticed this. I usually door sit with my MM on those, and nothing really ever gets far at all, but I noticed today that things seemed to run right past me this time.

At first I thought maybe they just decreased the amount of procs that happen in AoE attacks. However, after I did some testing in a +0 x4 rogue tip mission and in the arena with a second free account, it seemed at though the procs are severely held back in pets compared to before. For example, I use electrifying fences on my second account toon in the arena and the dots ticked all 5 times, almost every time I use the power. However, my un-upgraded assault bot's attacks were lucky if the reactive proc would DoT for more than 2 ticks. The same was true for all of my pets, including caltrops. I then tried using electrifying fences back to back, and I noticed odd behavior. If I used it for the first time on my other toon, all five ticks would work. If I used it right after the initial attack, sometimes it would get to 3 ticks, often times just 2. It's very strange.

I am fairly sure this was not the case before the most recent patch. I do not have the other damaging interface powers yet. Other factors besides pets may be working behind the scenes here that I do not know about.

Is anyone else experiencing this issue?

After running a few more missions, maybe it's just my imagination. Maybe someone go through an explanation as to how how reactive works? If I have a tier 4, does it grant me and my pets a 75% chance for extra DoT, or does the chance apply to each tick of DoT, or both? The in game description is pretty vague.

The way the Interface proc DoTs work is (if my understanding is correct):

You have an X% chance to proc the DoT power on a target, based on your specific Interface power.

Once procced on a target, the DoT will do one tick of damage, then roll a 75% chance to see if it will tick again. This process repeats up to a maximum of, I think, 5 ticks per proc. I have read that the average total damage dealt by a Reactive (and now, Spectral and Preemptive) Interface proc is roughly 50.

I24 Proc Chance = (Enhanced Recharge + Activation Time) * (Current PPM * 1.25) / 60*(1 + .75*(.15*Radius - 0.011*Radius*(360-Arc)/30))
Single Target Radius = 0. AoE Non-Cone Arc = 360.