The only interesting thing:
ONLINE CONNECTION REQUIREMENTS: For Multiplayer games: 2 to 8 players with optional voice support, network or Internet connection required (Cable, DSL, or faster connection)
no mention of the CnC 4 DRM online demand there!?
As for arguments for or against eh they are the same as for the First Decade release. HARD CORE purist fans won't get it because they'll already have everything; who it will apply to are those who maybe bought one or two games and can now get the whole series for a very reasonable cost - along with all the expansion packs (and in the pre-online days many games would get limited expansion pack retail releases making some very very hard to find and super expensive if you could find them).
It's mostly not a deal for me as the only things I lack are the CnC 3 expansion and CnC4 - the former of which I can get cheaper on Steam if I really want it and the latter is -- well - the DRM is one pain I will never pay for and the other pain is that it was just regarded as not good (It's the kind of thing I'd get in a super sale or bargin bin as a chance for some fun - at least if it didn't have that Online all the time DRM rubbish)