Carefully double check the bar diameter differences. Somehow, I recall a trekking bar diameter is the same as a MTB bar, which is smaller than a drop bar diameter. This means swapping out brake levers.

Ride it without tape for a while to fine-tune all the adjustments while doing some actual riding.

In terms of drop bars, Grant Peterson, of Rivendell and Bridgestone fame, puts them fairly high relative to the seat so riders can comfortably use the drops, so there is that option depending on stem options.

I tried moustache bars, did not like the loss of the tops, so I switched one bike to the On One Midge. It is a nice compromise from a traditional drop bar. Downside, had to order from the UK so it took a bit to get to the west coast of the US.