No. It's not too hard to raise initiation grade. And since there are many metamagics that rely on initiation grade for their effect you essentially multiply their outcome.
Raising initiation grade is relatively easy indeed, and probably the first thing you should invest in as a mage (you can probably do the first one after your first run). And while Centering isn't too useful as your first, getting it at 2 or 3 certainly adds a lot. Add a focus and it's not hard to hit 18 drain dice fairly early in your carreer, which helps a lot.
Define easy. If you mean you can raise it at the expense of ever increasing your Skills or Attributes or Binding Foci, then sure, I guess its easy.
And how are you getting it after 1 run? Maybe if you've already planned out your Arcana skill & then saved 7 Karma at Chargen & then also get 6+ Karma for your 1st run. That takes some pretty dedicated set up if you ask me.
Investing 30+ Karma to get +2 Dice dice for Drain & Counterspelling is a bit much IMHO.
And all it really promotes is to put off those "by grade" powers till later which then promotes Quickening first.
We all say that Quickening is overpowered and I don't disagree but when the other options have also been gimped badly then it just promotes making the non-gimp choice.
Making that go from 2 dice to 4 dice for the 30 Karma actually makes that choice somewhat debatable.
Or as someone else said, remove Grade from the equation & use a different stat, like adding Magic to Drain dice. That gives you a bigger boost at the start & will also push you to upgrade your base Magic stat as well.