Let the Codex come out and be played a bit before you make a decision. Points costs or any negatives are not usually listed in the rumors. Often, things look powerful but when tried, turn out to be costly or inefficient.
As an example, I recall the squeals of agony over AP 3 Hellguns. Then people realized that A: Stormies are very expensive. B. The Hellguns are still strength 3. C. Cover reduces the effectiveness of those guns quite fast.
As an example of things that look WTF awesome on paper, take the Battle Psykers. A unit that can slam pie plates with d6 AP, or, even worse, shatter the moral of an enemy unit, forcing an almost auto-break! It turns out that its only becomes very efficient for making Chaos Marines break and run, or uber-Knob units break and run.
Take a deep breath and wait for a little bit. You might find that the codex isn't so bad and Dark Angels are unique in some ways. Take for instance, the Sister's crown of being awesome at close range shooting with Flamers. Now, we have Sternguard, Flamers, and Burna Boys. Turns out, Sisters still come out ahead, as they are cheaper than Sternguard and Flamers, and have better leadership and save than Bruna's (not to mention a dedicated transport), and they score, and that's not counting a bunch of other nice tidbits.
As long as every other army can't mimic yours or your special units, I would not worry too much. Overlaps are bound to happen, and often the mimics are not as good, like in my Sister example, Sisters are still the heavy weight champs of short range shootouts. Eldar players like to whine about Valks. A Valkyrie still can't compare to a Wave Serpent, and Veterans can't compare to Aspect Warriors. Fire Dragons actually do a x3 Melta Veteran's job better, for less points! Guard, overall, still can't compete with Eldar for speed. One or two fast and armored skimmers in a list does not turn the Imperial Guard army into the Eldar. Closer, yes, but close as in New York is closer to London than Moscow.
So, my advice to you is play a bit before making a decision on the Codex. I can already point out that one advantage to the Dark Angels is that Belial is going to cost mcuh much less than the Wolfs, and that (I think) Space Wolf equipment will cost much more. SS/TH termies are supposed to cost 70ish points! So, you might have overall cheaper termies.