Effectively, the performance is a bit "sentimental." From what can be heard, however, the touch is pleasant and the final result is very beautiful.
Personally, I find the association "period instrument = intransigent philology" a bit annoying.
I think that the recent attention to period instruments, and to philological copies in particular, is an achievement and should not be considered merely a matter of pure philological taste, and certainly not a fad.
They are criticized for their lesser dynamic possibilities, weakness of timbre, less resistance to tuning, greater delicacy... Their voice, however, is something else entirely (not better, nor worse, just different) compared to that of the nineteenth-century descendants.
Scarlatti on the fortepiano... Bach's BWV 1067 suite on the traverso... Frescobaldi on an Italian harpsichord... W. Byrd on a virginal...
The authentic voice of the instrument and, through it, that of the composer who wrote for that instrument, comes back to life.
Interpretative choices are irrelevant. Everyone has their own... certainly today, in a very un-philological way, there is a sort of "urgency" to do something different from what has already been done and heard.
Anyway, W [blessed] is whoever plays Beethoven on the fortepiano (and especially blessed is he who can afford it).