I think you've got a wonderful thing going with PPL, and even if it doesn't have every feature of the other packages, it has many that others don't (ex: desktop debugging, which NSBasic doesn't have, the ability to reference DLLs, which NSBasic doesn't have, SQLite support, etc.). As for the grid control, that is an enhancement to NSBasic as of version 5, so it is a relatively new feature. Maybe by the time PPL is on version 5 it will have a grid
Again looking at NSBasic as an example, I've been on their yahoo group for several months now, and you'd be surprised at the things NSBasic can't do (and will never be able to, because it's based off of VBScript). And, try coming up with anything close to the GameAPI in NSBasic. Believe me, I've tried, and it's not going to happen.
Now, as for the whole grid / listview thing, if you want to use listviews, take a look at the ListView_Lib.ppl library (which should be part of the main distribution). It makes working with listviews fairly easy (I've used it once or twice myself... that, and I wrote it). If you guys ever want wrappers around another control, let me know and I'll see what I can do.