Thanks for the feedback 
The only thing that gets me is the look of the text on the signs. Perhaps a more carved look or burned looked if it was wood and so forth.
More fonts are planned, but it has a low priority at the moment unfortunately 
1) signs do not work, I put text on sign then plant them, just get a plain board.
In some situations it seems that the text does not appear. It may happen in singleplayer as well as in multiplayer, I'm currently looking for this bug. As a workaround, reloading the world seems to fix the issue sometimes.
2)I go to place a blueprint and get fatal exception error that I attached. I also attached the error log from Rising World folder.
Yeah, unfortunately one of the last changes caused this issues. Once the issue with signs is fixed, a bugfix will be available (which - of course - also fixes the blueprint issue). Expect the bugfix either this evening or at the latest tomorrow 
the only sign that appeared the name was this in the photo and see how it turns out.
This issue will also be fixed in the next update
It seems to happen to those small signs only (you are able to write 2 lines of text of it, but only 1 line of text was intended).