These are miraculous, to be sure, Max, but not followed by any mystical revelations: no discussion of Unity, of the Nature of Reality or of illusion. If These were mystical experiences neither Jesus nor Mary subsequently revealed any special metaphysical insights or teaching.
This is why I say He didn't talk like a mystic and why I don't see the Abrahamic religions as mystical.
there are varying definitions of what 'mystical' means, but one of them is:
"Of, relating to, or stemming from direct communion with ultimate reality or God"
and according to this definition i think Mary's encounter with an angel (ie a divine agent) counts as mystical, also the angel revealed Mary's destiny as the mother of God to her, which could be understood as a kind of mystical revelation
Also, on the wiki page about the transfiguration it makes the following (referenced) statement:
"In Christian teachings, the Transfiguration is a pivotal moment, and the setting on the mountain is presented as the point where human nature meets God: the meeting place for the temporal and the eternal, with Jesus himself as the connecting point, acting as the bridge between heaven and earth"
this seems to imply some kind of divine unity, which could support the idea that this was a mystical experience. But i agree that this is an ambiguous issue
However when Jesus says 'me and the father are one', that sounds unambiguously like mystical talk to me, he is saying that his will is united with the divine will, which is another prominent theme in mystical experiences