Is undo-tree dependency strictly necessary

[Justin Gordon]

Leo Alekseyev <dnquark <at> gmail.com> writes:
> I was wondering if undo-tree is only there to match Vim behavior, and
> if I could use Evil without it.  I actually find built-in Emacs undo
> functionality intuitive and I'm used to how it operates.  On the other
> hand, I've run into some cases where undo-tree didn't behave as
> expected.  If there are no ill consequences in using original Emacs
> undo vs undo-tree, it would be nice if it were configurable.

I agree. Sometimes I stay in insert mode too long, and accidentally hit cmd-x 
rather than ctrl-x and delete to the last mark.

Is there any way to change the granularity of undo-tree so that any sort 
of deletion is tracked?

Thanks,

Justin