1. Sample triggering / drag and drop your own samples and create your own kit on the fly / instant expansion packs available
2. Warping
 
I know they can be achieved in Sonar through some jiggery pokery but if they could nail those two elements from Ableton on top of what they've already got it would be the greatest software ever made for me

Not sure what you mean by warping but you can drop samples into session drummer.
 

Here is a tutorial on drag and drop Sampling in Sonar, it applies still today for use.


https://m.youtube.com/watch?v=jYV_BPqk_GQ

Warping, please explain further?

Drag and drop any loop, acapella, in fact any audio and it will render, in sync automatically to your track on the fly. If you've ever used Ableton you'll know. As for session drummer sorry but that's a joke compared to Ableton
 

The very fact there are a million, drag and drop ready, 3rd party sample packs for Ableton should give you a clue
 

So, you have too things you wish to raise on the forum, one you say w have to use Ableton to understand, and the other just can't be compared, but don't say why. 
 
I's this thread intended just for those who use both Ableton and Sonar then?
 

But don't get me wrong there are some features in Sonar that Ableton doesn't even get close to.  As a traditional "tape recorder / Studio / editor" Sonar is second to non in my opinion, but for fast creation on the fly Ableton beats it hands down
 

I suppose it was intended for users of both yes as they are different horses completely. If you've not used Ableton as a creation engine before I'd be here for months trying to explain how it works but trust me it's incredible at THAT.  However Sonar is incredible at recording editing and mixing, if somehow they could swap features then it owuld be the best of both worlds.
 
Studio one had a good go but is still way off the mark in terms of the power and stability of Sonar in my opinion
 

1. There are many third party solutions that accomplish (1) if you want to add this capability to SONAR.
2. Live's Complex warping, in the two upscale versions, is IMHO the best of any DAW. The regular stretching isn't that different. However, I haven't missed it when working in SONAR; I guess I'm facile enough with how to do the equivalent in SONAR I don't consider it jiggery pokery. If I could transplant Live's Complex Warping into one and only one program, it would be Traktor, not SONAR.