MDS Questions....?

Hello,
I have an 06 Non-eagle 5.7 My harness and ECU (Bouchillon Performance) have the MDS delete. I don't plan on removing the heads anytime soon. So swapping the lifter is out for a while.
Question.
1. Will leaving the MDS lifter effect anything or do I need to swap them if I'm not running MDS?
2. Can I remove the solenoids and replace them with plugs will this effect anything or should i leave them in if the lifter stay for now?
3. Has anyone had any issues with the MDS?

Any and all comments or info is welcome.
Thanks
j