I admire those who can make coherent artistic statements while building longrifles not thoroughly based on regional characteristics of originals, but such rifles, for me, lose their link to the past. I feel the same admiration and distance for accoutrements that don't "fit" historically. I prefer work that would fit within the wide range of rifles, accoutrements, etc originally made in a locale in a specific timeframe.
As far as new directions, the ones I enjoy the most are those opened up by new "finds", like the Oerter Griffon rifle, the Leyendecker patchbox, the Deschler rifle, etc. Books also inspire many new works, so whenever a new picture book comes out, folks get a fire lit inside and rifles related to those illustrated start to appear.
If you look at accoutrements, the trend among horners, broadly speaking, is to more closely represent original work. In the 70's and 80's, we saw a lot of stuff scrimmed on horns that had no historical basis- beautifully rendered bugling elk, bison, etc come to mind. I admire such work but it doesn't fit into my mental framework for the hobby. When I see a horn that fits the French and Indian War period, or even a Tansel-inspired horn from later, it works for me.
Same with bags- the work done today more closely represents original work than at any previous time period. And when Wallace presents a bag with some real historical provenance, it quickly inspires some great new work.