I'd rather see an eight-seat SCOTUS than another lifetime appointment to a squish who wanders from original intent. And that there are Romneys in the Senate is no excuse for caving to them, because that's how we get squishes on the court.
Then you won't have an eight-seat SCOTUS for long. The Dems will name the ninth Justice, and then your gun rights will be screwed.
I mentioned earlier the name of Judge Thomas Hardeman. Look him up. He's got a proven track record of supporting the 2A, and the individual right affirmed by Heller. Someone like him can gain the 50 votes needed in the current Senate, and help protect your gun rights for the rest of your and my lifetime.
Your eight-seat SCOTUS absolutism works only if the GOP continues to control the Presidency and Senate. I think there's little chance of that. Trump likely loses to the Democrat. Even more likely, the Senate flips. If Trump wins and the Senate flips, you'll get your "squish". If Trump loses, you'll get another Ginsberg.
If Trump gets the opportunity to name another SCOTUS justice, don't look that gift horse in the mouth. Get the best jurist we can on the Court, and don't blow the opportunity.