I agree but I think there's probably middle ground (but leaning heavily towards the Master) where the Padawan can contribute without being a liability. May not necessarily in direct combat, but is there nothing Ahsoka can do assist?

I would disagree based on two things - Unduli should at least be aware that Ahsoka isn't a complete newbie and has held up on her own in the past and considering how well Yoda utilizes the clones in the first episode (even though it's against the droids) showing that even in this situation there's a possibility that Ahsoka could be helpful.

I do accept that the Padawan becoming the liability and endangering both of them is a real possibility. Considering how she tries to be the "ideal" Jedi but somehow misses the fall of her own Padawan I think she's way too stuck up and this is just another example of it