Don't take it the wrong way. It looks like a nice start. I just wish for better reversing tooling, and am merely giving a critique that if this was to replace IDA for me, it'd have to provide something that IDA does not.
There's plenty of things IDA does that we don't do, but the list of things we do they don't is growing.
To start with, we have undo, which is a simple feature but it underlies some design decisions that are going to show up in other features in the near future as well.
Because we have the ability to separate user interactions from our internal analysis we can not only undo, but also better support collaborative editing and upgrading of older saved databases.
In terms of features we already have, we have a static data flow implementation that allows you to query register values at addresses which greatly simplifies a lot of analysis plugins. Here's an example:
I see that you have faithfully replicated at least some of IDA's insane graph view glitches.
Do you have the one where a line goes to one side by more than a screen's width, goes down a tad, and then goes back sideways to nearly where it started?
