I converted my M. tenuifolia to s/h on April 1st of this year and for awhile it did a whole lot of nothing. Starting in June it began developing lots of new foliage but the roots didn't do much. A couple weeks ago I looked and found a brand new root growing! So I think the conversion has gone well and it adapted just fine.
I did the same to mine a couple months ago. it was mounted and grew outside all year but no blooms. when I took it off the mount with too much moss the roots looked bad. saw one new shoot now. but I put it in a 8" pot so it wont need repotted soon.