I think the OCA already has St Tikhon's in the proximity.
Adding to Dn. Lance's comment: by moving to W. Pa, in the same state as STOTS, SVOTS would be moving physically further than they are at present.
While I am biased, Pittsburgh is probably the best. Cost of living is cheap. You have excellent universities nearby. Several Orthodox summer camps are here. Antiochian Village is here. Most jurisdictions have parishes here. Greeks, Antiochians, OCA, and Serbians have cathedrals here. ACROD is in Johnstown.
While there's a lot to be said about Pittsburgh (and I agree with your fundamental points), I'm not sure it's the best of available options. Something S/SE of Chicago (proximity to 2 airports) would allow for a better mix (accessibility by direct flights, large # of parishes, institutional/diocesan support, centralizing move, etc.). I mean, really, something very central (St. Louis or Kansas City) would probably be better, but there aren't a critical mass of parishes in those areas to support the academic work.
A friend and fellow SVOTS alumnus who is well informed told me the Board wanted to move to Texas. Another friend, an architect for whom I used to work affirmed that SVOTS alr paid him to draw up preliminary campus concept plans. This late announcement is just their making it public after they’ve already decided on making the move. The OCA is suddenly becoming very Americanized choosing for reasons unfathomable to me, the most chaotic and autocratically misgoverned part of the country from which to base its operations.
I'm not against the seminaries moving out of Yonkers (SVS) & Boston (HC) because they're northern
per se, but cost-of-living certainly affects the cost of the education (esp. insofar as professorial and support staff remuneration affect tuition & board rates). I suspect that this is a major reason (that, and making a boatload of $$ selling land that has appreciated far beyond inflation over the last few decades). With Holy Cross in Brookline/Boston, these pressures have remained steady over the last 15-20 years: sell this incredibly valuable land, build a new campus and still have $millions to set aside into the endowment (to help reduce tuition costs and better secure the fiscal future). While SVOTS doesn't have the same high cost as HC does, I don't doubt that similar pressures exist.
But what you miss by moving out of those areas can't really be met elsewhere. I don't know how the relationship with other theological institutions is for SVOTS, but for HC being a member of the Boston Theological Institute (BTI) with Harvard Divinity, Andover Newton, Boston University, etc. allows for cross-registration and a lot of access. It would be hard to replicate that outside of the NE corridor.