I'm not sure Ilya's the main problem with LR. It's certainly not the optimal strat and rougher on uptime, but it's fairly safe and easy to understand. PF's problem there would be greeding on orbs or lack of focus and groups that can't get through with Ilya are probably going to wipe non-stop on other strats too.

It's a mechanic with a whole number of ways to wipe your entire team at a single slip up and it's quite hard to see who causes the wipe. It only takes one player being greedy, unfocused or just not that good at difficult mechanics to make it a wipefest. I like it as a mechanic, it's satisfying to see it go like clockwork with 8 people, but I can understand why it's a nightmare in PF.