I think there's an issue that you're detailing the tiles rather than the scene. If this set is for a bar/pub/tavern/inn, or really any setting, try thinking of things that can go in it to add interest without adding pixel noise.
For instance, when I think of a pub, today or way back (for some reason I'm going to the late victorian era with your palette), I come up with:
walls:
* narrow front windows across an entire wall, or nearly so.
* routinely built on a corner-lot, for 2 walls of windows.
* a nook or two
* shelves with bottles
* photographs, papers, advertisements, and other flat memorabilia
* soot from cigarettes, cigars, and in old times kerosene lamps or even candles depending - concentrated near the ceiling.
* tchotchke
* heating. these are warm places. a hearth should be found somewhere in any bar built pre-war, even if it's closed up.
* coathooks and hathooks, generally under the counter in front of the barstools, as well as by the door.
floors:
* boards stamped and pounded so hard you can only tell the cracks if they've been replaced or are otherwise a different color from the boards next to them.
* pits, stains and scratches more visible than cracks or wood grain.
* Straw and peanut shells on the floor - a necessity, grouped under furniture and in corners.
* if there are cracks, they're actually lighter than the boards, because they're filled with pulverized bits of the above.
* a particularly smooth, ashy ring in the largest standing area or most-used path of traffic.
* tobacco stains everywhere
I can imagine a very engaging bar with very little texture/noise and even just half of these things. don't spend so much time on individual tiles, spend time creating an environment and then detail if you still feel the need to once that's done.