After playing pr13 for a short while, I find I completely agree with Bieks and SirTheta. Yesterday I was swarmed by berserker kings, emperors and white dragons summoned by a lich king in the Griffyard. Those monsters were as tough to kill at that point (I was a level 19 Chaos Knight), but didn't drop anything. Yeah, you still get XP and weapon marks, but that hardly makes up for it.
This change makes summoners more frustrating, even with the uberjackal effect fixed, because you have to wade through hordes of monsters and what do you get? Maybe a few corpses depending on the monster. Before this, at least you'd receive some treasure as a "reward".
Pickpocketing gremlins was the only problem (I've never heard of anyone e.g. deliberately allowing summoners to live just to get more drops), and that's the only thing the nerf in issue 813 should apply to, if that tactic is deemed to be so broken. You'd still be able to kill them for items, but eventually they'd get too powerful, limiting their long-term effectivity as an exploit.
And issue 1204 essentially killed pickpocketing, at least for PCs that don't start with the skill. Now you need to get it to at least 50% before it remotely has a semblance of usefulness, which the initial skill level of 1% and low training dice do not allow to happen so quickly. The result: it's useless early on, when the extra items are most useful, and causes frustration, because you have to 'a'pply it a ton of times (and wasn't part of the idea behind nerfing it reducing button presses?). This makes it as useful as Haggling. :/