I agree Adelaide Arena is ideal for Adelaide in respect to size at the moment and level of control/basketball purpose aspect to it.
With that said - it's not a great long-term prospect, and I don't want to see a lost opportunity.
A city location may be a much bigger market for the 36ers in respect to both ticket buyers and corporate dollar.
We saw Port, for instance, go from pathetic crowd sizes and coverings to almost filling out the stadium - even when they play badly. Adelaide we see record crowds etc.
When you can draw in people after work on a Thursday/Friday, when you've got ease of public transport access and when you've got the ability to 'make a night of it' by enjoying the restaurant and bar scene before/after - you've got a perfect little storm for attracting people to the game. Adelaide might average 6,000 at Adelaide Arena, perhaps 9-10,000 would be on the cards in the city?
Reality is, there is a huge difference to people going to the effort of driving out to a particular suburb to go to a game, and people going 'there's a game on in the city, let's go'. It might be a perception thing or a legitimate logistical thing - but the CBD draws the crowds better than suburbia.
The other thing is, Memorial Drive is a perfect location and an absolute joke at the moment. The facilities are so lacking, Tennis SA can't even bid for events like the Davis Cup. This means there is likely to be either a few million spent on small upgrades, or a few extra million spent on something half-hearted which would rule out a much more long-term and beneficial use:
A stadium/gym which accommodates for tennis events, basketball games, netball games, Crows and Power training, Crows' "the shed" after game for functions, a gym (although there is nextgen...) and a media centre overlooking Adelaide Oval. Mixed use could keep it going all year with shared lower costs, and with the Thunderbirds finding ETSA Park too small it wouldn't be hard to convince them to use it as a home court. Then there's the potential to use as a velodrome like Rodlaver/Hisense Arena has in the past - (I think there was talk of an innercity velodrome?) which brings Cycling SA/Australia into the talks, and of course any future bid for a Commonwealth Games if the state government so decides to attempt it.