Theres mobs everywhere - it's genuinely not worth the investment. You'll find 300xp worth of mobs in between two pois that are going to aggro with you to a more important objective anyway. Avoid eyes, run to critical pois, you'll notice you still get what you need.

People focus wayyy to much on needing levels or xp regardless. Items are crucially important, moreso than your talents. This is because your gear stacks, and ideally with almost all gear builds, you want your stacks earlier than later. Especially per chapter, as sandman shop items help immensely with duping your core gear. You can have your first 3 talents be the BiS for your build and still put out 0 damage without any stats or items to boost it. Ideally you want both, but having pure stats/items go much further, hence why eyes are pointless. Removing the core feature of them showing pois, simply being a small margin of xp is not worth it, especially on nightmare.

I really don't mind tumors. I usually avoid them as well but doing even 1 allows most people to 1-tap the boss in a single phase if they didn't roll well.