Bishmon said:
At the expense of giving up an equal-level power from your own list! If I toss $5 in the garbage, and then take $5 from a friend, I haven't gained anything (except an angry friend).
But
getting access to something that opens new options that you Would Not have had before is Worth a feat!
90% of the feats that we have seen seem applicable only in certain situations. +1 to Saving throws. +2 to AC only when you're beside two larger opponents. +2 against opportunity attacks. +2 when you use Encounter Power X. +3 When you use an Action Point. You don't give an enemy CA when you are surprised. You get weapon training with x weapons.
Those are very narrow, specific situations. They're like turn undead: they make you useful, only in this situation, or only by expanding your options slightly. How is getting trained in another skill, or access to these weapons over here, GREAT? It's not; it just an extention of an option. Just like the MC feats.
So you're basing your comments on the assumption that powers of the same level will not be balanced. Ok. Fine. That will indeed make the multiclassing feats more useful. I'm not eager to see what those imbalances will do to the rest of the system, though.
Grr. I'm not assuming that some powers will just flat out suck. But I am saying that not every option that everyone has in their class is going to appeal to them for their build.
For instance, if you're playing a Rogue who uses thrown weapons and crossbows, and you want to stay out of combat, you likely aren't going to pick up abilities that rely on
melee attacks, or being in hand to hand combat, right? But all the rogue abilities we've seen rely on melee attacks.
So what do you do: you get access to another class's abilities that have more ranged options, such as a Ranger who has those nice ranged powers.