It's okay. Thanks to Quicken Metamagic and the SCAG cantrips, it's not as big of a deal as it is with every other martial, but it does save you a few Sorcery Points at the cost of inferior damage and being unable to use your action for anything other than basic attacks if you want to benefit from it. Those are some pretty big drawbacks, but so is blasting SP in a build that gets real thirsty for them.
The real problem is that you can't realistically combine it with Sentinel all that well because Sorcadins are also ASI starved. You'd have to give up a lot to make this work better than okay.