I went for over two years with a bard ini that I thought was working but found out he wasn't slowing the mobs. I went from learning to tank unslowed mobs to feeling like cheating when a mob is slowed. As for the OP you are trying to decide as to whether or not CC is necessary, I will tell you no class is absolutely necessary not even a tank or a healer, it just depends on how you want to play your group. I know Necros that solo most group content (molo on missions) and mages that use a pet tank in their 6 man group (I have a group like this), so no CC is not a requirement, however, like Hanlons stated, the time wasted trying to split a 2 or 3 pull (or sometimes even more) is time wasted where you can just mez, root, or even use the CC to pull out singles quicker than the SK.
Take for example an Enchanter most of the time can pull way more efficiently than an SK. The Enc just casts AOE mez, DoTs the one he wants to pull and then mem blurs the rest. Sure it has been mentioned that not all mobs can be mezzed but I cannot confirm that about the new expansion because I have been using my bard and I have always found my bard to be subpar compared to an Enc in regards to mezzing. I am not saying bards are subpar for all the hate mail that is now coming my way. I drive My Paladin and he does ALL of my pulling for my group and lull is great, but the problem I have is trying to stay ahead of respawn. Last night I was camping a named and I could not consistently stay ahead of the respawn using the lull method so I just gave up and pulled 2 at a time when needed. There was a 3 pull that I ended up pulling once and nearly wiped but had to pop a lot of discs. I never updated my bard ini from lvl 120 so my bard was not able to even try and mez. I since updated the ini and will see if he mezzes now.
I guess the key point here is you will hear about the holy trinity of tank, healer, cc but you always need to decide what makes you happy and play what makes you want to log in. Sometimes your makeup will not allow you to beat content and others it will make the content trivial. My advice to you is to add 3 more boxes and run a full group. If you are using MQ to run one toon why not 6? I started out my Redguides journey with a Pally and Enc combo and I wasn't even using any automation I just made a heck of a lot of hotkeys using eqbcs to tell my enchanter what I wanted him to do. ex:
/bct enc /
/target mobs x /
/cast 1 etc. It didn't take me long to realize I could control 4 more toons that way so I added 4 more FREE accounts. And guess what those 4 free accounts are way better than mercs. Sure I subbed them one month at lvl 115 so they can all get free AAs and now they are 1000% better than a merc. I guess this whole post was bascially to tell you that you dan't have to decide between cc or dps when you can always add both.