Just to comment on a couple of your points here:
1. UCF averaged 44,018 fans in 2007 and only slightly lower for 2008 (40k, because of a low-consequence thanksgiving weekend game to finish the season). So the 25k/game average number is slightly misleading. In fact, BHNS has been very near or at capacity for every game (but one) that UCF has played since moving on campus.
2. You've bought entirely too much into the Sentinel's garbage headlines about the construction of BHNS (probably the ONLY thing you've been exposed to related to the stadium - but that's not your fault). The simple fact is that conventional concrete construction was never a possibility at UCF for the first phase of BHNS with the available funding - Private donations, University funding, and athletics revenue - but NO public $$$ (unlike those at both UF and FSU). Instead of a $60mm project, you would have been looking at something in the hundreds of millions of dollars. However, if you actually attend a game at BHNS, you'll find that the enclosed bowl design of the stadium provides for a very loud and exciting atmosphere, and the close proximity of the stands to the sidelines puts fans right on top of the action. It's a great meld between traditional closed-bowl style stadiums like ND stadium and the Big House, and Lane Stadium at Virginia Tech. Also, for reference to a great example of a steel-constructed stadium turned into one of the most beautiful football venues in the nation via investment in expanded phases, look no further than FSU's Doak Campbell Stadium:
Early Doak (on opening day):
Doak Campbell Stadium today:
Bright House Networks Stadium today:
So I don't think it's plausible at all to say that the current state of BHNS precludes it from becoming a top flight venue. If anything, it's a far superior design to the current Citrus Bowl, as the possibility for revenue-generating luxury suites (you know, those things that bowl commissioners like to sell) far surpasses the shortfall of suites at the CB, and is really LIMITLESS. Heck, you could conceivably wrap the entire stadium in suites if you wanted to! Also note that current expanded design specs can place BHNS capacity at well more than 60k, and closer to 80k. However, anything is really possible given the necessity (i.e. major bowl games). Point being, the current BHNS is a great base layer with unlimited potential.