When 1.17 comes out try adding these new features with these blocks
Grimstone(and all its variants)
Grimstone ores
-try adding these kinds of grimstone in halloween maps.
Stalagmite and stalactites
-they would be pretty cool designs and it would make maps more unique and detailed. Also since they do alot of damage when they fall on you or you drop on one just let it stay and be just there for design sakes
amethyst( that will be like the mid In SW,SG,and TW maps)
skulk sensors and maybe add redstone to make them work
-skulk sensors would he pretty cool since more traps and more evident vids lol
Also try adding bundles to TW
-since you get like alot of stuff in TW you will need bundles to store all your stuff and they should be worth like 2 diamonds.
Lastly try adding candles too
-candles could be pretty cool when there is a mansion house map being made and the candles can be on the table in other maps too
Well in short try adding more 1.17 items and blocks to the future maps when 1.17 comes out