Why don't you like Innsbruck? Is it the high mountains? Do they scare you?
Olympiaworld looks very modern and don't forget it's bigger than the venues of 2013 and 2014! Innsbruck overall is very modern and there's lots of buzz, young folks and a cool nightlife. I'd be happy if Innsbruck gets the spotlight, Vienna already had plenty of it!
For ORF it looks like the best choice, because the province of Tyrol and the city of Innsbruck seem to be willing to bear ALL the costs, whereas if the contest goes to Vienna, the costs ends up on the public because ORF would most likely raise their fees to pay the Eurovision bills. According to a rough calculation, they assume 25 million of costs and 10 million of revenues. And Vienna has even more trouble, first of all, the saying goes that a cancellation of the Stadthalle bookings would be penalised by a rough 5 million euros! Furthermore EBU requires a cooling system, something Stadthalle doesn't have - so there go another 4 million euro into the renovation. But since Vienna seems very keen on hosting Eurovision next year, they are throwing the Neu-Marx area into the bazar, where there is an old industrial facility but also plenty of space to build a brandnew arena.... Crystal Hall y'all. They would have to spend 120 million euros at least, and that's money they just don't have and time is also running out. I don't think EBU would approve that the most expensive contest would be held in Vienna, after their own efforts to downsize it again after Baku and Moscow.