They have some super talented people, but I frankly think they're just strapped for resources. I hope this round of investments will allow them to scale their engineering team and get scripting side of things more solid.
With all the recent C#/.Net open sourcing, they have a lot of tools at their disposal, but from my perspective they're not using them to their full potential.
[1] http://blogs.unity3d.com/2014/05/20/the-future-of-scripting-...
[1] http://blogs.unity3d.com/2016/04/01/unity-joins-the-net-foun...
They do have some kind of mono compiler update in alpha according to their roadmap [1], not for the runtime.
I wouldn't hold my breath, that's all.
"@dsyme working on Mono upgrade which should help. [..]"