To be fair to Corona Labs, their SDK has always been primarily geared towards creating 2D graphics (i.e. games) in an OpenGL canvas with only a nod towards business apps with the Widget library. The reality is, I strongly suspect, that very few Corona developers make a living out of developing games apps and most are supported by day jobs doing other things. In fact I've never met another Corona developer who makes his living out of just developing apps with Corona.
So back to the question; what could Corona Labs do to help developers of business apps? Well there are quite a few relatively minor things - well at least things that don't require the probable massive investment in creating a cross-platform native UI library. There is always the Enterprise Edition if you want to explore that avenue, but that's not for the average developer. Corona Cards initially looked like a more attractive proposition, using a Corona canvas for the 2D graphics stuff and overlaying native objects. Main problem, as with Enterprise, is that the native stuff is, by definition, not cross-platform, and you also have to pay separately for each platform. I could see great attraction in using, for example, Appcelerator, for all the cross-platform native UI components and then embedding Corona Cards for your graphics, but the cost of licensing each platform separately makes it less attractive. Its good to see Corona Labs bundling WP8 support into the Pro subscription so something similar (i.e. a bundled price) for the iOS and Android versions would definitely appeal more.
Another feature of Xamarin is that they offer a true monthly Indie plan, that is you pay for it monthly, not annually - why can't Corona Labs offer genuine monthly plans for their products? Cash flow is much harder to manage for indie developers than companies like Corona Labs with their venture capital funding (OK I know they're not a big outfit in Silicon Valley terms). Also I note that if you purchase Xamarin annual licences they don't stop working, or fall back to basic features, if you decide not renew but continue to work, with all features, just without future updates. Food for thought there?
Back to specific Corona features that could do with a bit more love for business apps. Well much has been said about the shortcomings of the Widget Library, and Corona Labs response has been to make it open source. A bit of a cop out to be honest as I don't think it would take that much to resolve some of the issues, particularly scalability. The developments by the Widget Town guys are to be commended in attacking some of the issues.
The other important necessity for business apps is the ability to utilise back-end data sources. This is actually pretty well supported by Corona, as long as there is a REST API to access the required data, and using products like Coronium makes things even easier and more powerful (congratulations and thanks to Chris Byerly for all that he's done in creating and supporting Coronium). I would suggest that Corona Labs give him some official support, if they don't already, but maybe that would be the kiss of death given previous experience in that area ...
So I hope there are some positive thoughts and ideas in there for both Corona Labs and other developers to consider. I would love to continue to solely use Corona to develop business apps, as that's where the most potential income is, but I also need to keep one eye on the competition too.