The way the trading works on there makes it impossible to trade for day traders and bots. Additionally orders are limited to the sellers choice and that means if you want to buy bigger amounts of coins you have to do several trades with different partners.

On top of that process is extra cumbersome as when you click an offer the seller needs to approve of it (IMHO this is an unnecessary step, it would be easier if the bank details would be displayed straight away, as on bitcoin.de for example).

I also get the impression that even after MtGox many prefer the "old financial world" system of a forex- or stock-like trading system where you need to send your funds to a third party first (and in some cases they still keep it there for extended periods of time). It's perceived easier to trade, as once the funds are on the site you can just click-click-click and you're done. With systems like bitalo, bitcoin.de and bitoin-otc the process is more involved, but also safer for your funds as in they are not stuck with a third party you need to trust and is on the other side of the world. Instead you trust your direct trading partner, which has it's issues too of course.

The advantage of exchanges like bitalo could be regulatory as they never touch user's fiat. It works more like Ebay. So the licensing could be easier in the future when we get to a point where bitcoin is more regulated across the world.

But for now low volume means little word of mouth and unless they pull a marketing campaign, that won't change. I don't know if you followed how Kraken started, but that was their problem in the beginning too. Exchanges need volume to succeed.