The app is already well worth the $0.99 I spent on it, IMO. Anything from here on out is just extra value, as far as I am concerned.
Yes, the app doesn't support a lot of basic apps, but the dev has already stated that that is due to the app's incompatibility with the method used to make the custom transparent tiles. I'm ok with that. As for IE, well, IE is already transparent, so I don't see why the dev should bother with working in support for IE into his app. As far as the selection of apps that are available, I do find that there are some that I've never even installed, let alone use. However, that doesn't take away from the apps that I do use (and there are quite a few of them: OneNote, Health & Fitness, Sports, News, Weather, Facebook, Twitter, Music, Video, Games, MixRadio, MoliPlayer, MetroTube, Here Maps, Here Drive, eBay, and the custom icons for pinned websites) that are supported. So for me, app compatibility at the moment is already great and as the list grows, it will get even better.
Being able to customize the title is a great option to have. If you wish to have the option to have no title at all, you should suggest it. I don't see myself using that option (I don't even use custom titles as is), but the more features, the better.
The settings options is one I don't use myself, but from what I gather, there are still people who pin settings to their start screen, so having this option is great. If it isn't useful to you, then you don't have to use it.
I'm sure, as well, that it will get better. However, I disagree and believe that the app is more than just having "great potential". I already feel it is a great app.