My personal experiences with the train have been bad but most of my reasons wouldn't apply to you.
If you aren't tailgating then there's no downside to taking the train to the stadium, besides possibly being forced to spend upwards of 10 minutes in Secaucus.
It will probably be slow going on the way home but as you said, the traffic will be brutal anyway.
One of my disadvantages is that I don't live that close to the subway but if getting to the LIRR is convenient for you, and I assume it is, then go for it.