Eric Segall in the Daily Beast.
I would have been in favor of the Senate Democrats boycotting the hearings and the vote altogether in protest of what happened to Merrick Garland. But it is too late to play that card. Therefore, the only remaining question is how Democrats should play the current hand to maximize leverage and chances of success in the future. This is an issue of strategy not principle. The answer is to put the filibuster card back in the deck. That decision does not guarantee it will work next time but the players both at the table and away from the table may be very different the next time a vacancy arises. Sometimes the best strategy is simply to leave the table and come back to play another day.
My earlier thoughts on this (linked by Eric) are here.