Fighting above level all the time and getting debuffed all the time so overcapping accuracy seems sensible but point taken. As far as squeezing dps, again you can do so better by lowering recharge and end cost than by adding a third damage IO. This is exactly what I'm talking about, more damage IOs =/= dps after 2 in many if not most cases.
You're not wrong, but it's also highly dependent on powersets. Some have better accuracy or give more recharge or recovery, etc. Plus a specific attack may already have a short recharge and reducing it past one recharge enhancement may not be the most efficient. This is also dependent on the character level, generally the lower level the more I slot for accuracy and end redux since all the powerset's tools aren't available.
If I six slot an attack while leveling, I'll usually put in 1-2 acc, 1 recharge and 1 end redux, and 2-3 damage.