When you have very skilled players the large sheet is great. 2002 US-CAN is a prime example. The USSR had some epic games against Czechoslovakia in the Olympics and World Championships - both squads were LOADED.
But when you have lesser skilled teams, yes it can be "boring." It's easier to push the play into the dead areas and play defensive keep-away. In my opinion, the larger ice enhances an already entertaining game but can make a boring one even worse.
Regarding Belmont, not sure why they would want/need to have the capability of a large sheet. Unless NY is planning on hosting the Winter Olympics again? A few years ago there was a talk of a joint Montreal/Adirondack/NYC bid. But one-off type international tournaments can be played on NHL size rinks.
I just hope they put steel piping, have a centered scoreboard, sight-lines where you can see both nets and good cupholders.