Crazypool does not remove uncle rewards. They pay the full uncle reward and it is split amongst the pool the same as any other block is. The more valid shares you have submitted then the higher your share of the reward. Uncle blocks and stale shares are not the same thing.

I've never heard of 'level 1' stale shares before this isn't a term commonly employed in the space. The stale shares reported on the pool side are not seen in the miner client output screen. The only non valid shares the miner client reports are the two rejected shares I have currently which are also shown in the hiveos dashboard.

I'm currently running the recommended intensity by the dev of 24 with my 69/68/67/6600 series cards.