Now I'm curious about Enhanced and/or Shifter but are they compatible with the ones above as it seems at least enhanced use the DeusEx.u file but so does Renovation. Any help would be highly appreciated!
Shifter and DX Enhanced do both modify DeusEx.u and DeusEx.int; as such they cannot be used in combination with Human Renovation. The three projects have different points, as well. Human Renovation, bugfixes. Shifter, bugfixes, restored content, new content, new augmentations, and some new mechanics. Enhanced, to pretty up the UI and such. (Also note, Enhanced includes everything Shifter does because it's based on Shifter.)
Shifter and its' derivatives are game-changers because of the "skill points for kills/stealth" mechanic they add, which encourages both murdering everyone (as the kill bonus is way easier to manage than the stealth bonus) and it also encourages save-scumming (to maximize bonuses by always killing with headshots.)
If you want to see Shifter's content without feeling like you're being railroaded into killing everyone, go for BioMod, which also based on Shifter, but focuses on making the augmentations less unwieldy, and also removes the skill point bonus system. I believe BioMod is not compatible with Enhanced, however.
As far as the scaling thing, you could try the UI fix from Off Topic Productions. http://deusex2.filefront.com/file/OTP_UI_Fix;84991