First let me say that the viewing experience at the Mac is one of the best, if not the best in college hockey... but..
When you have 2500 seats and you sell almost that many standing room tickets, and do it several times a year, that means to me that you need more seats. I would think a healthy ratio of maybe 5 to 1, seats to standees is about right. selling 2000 standing room tickets seems like an awful lot.
Second, it's about more than seats. The food services are terrible and Tech could really make substantially more money on food if the service was good and people didn't have to wait for 30 minutes to get it.
Third, bathrooms. once again, bathrooms are fine with 2500 people but when you have 4000 or 3000 even, the waits are long, they run out of paper, and on the whole it's not that good. You should be able to go to the bathroom, get some pizza, and be back to your seat between periods, and that does not happen now.
Forth, we could use a place for the Hall of Fame and some additional suites.
Fifth, check out what newer arena's around the country are doing. Making the games an experience brings in more people.
So I'm for having an expansion sooner rather than later. I think additional, similar quality, seats are important in the scheme of it.