As much as I like the look of the new biomes, I can't help but find them to be a little...... meh. At least, on their own. You see, here's what a player could look forward to upon locating each of these new biomes:
Crimson Forest: A decently perilous place, with.... not much in it that isn't solely decorative. Sure, it's got a mushroom that can ward off decently-difficult Hoglins, and Piglins whose barter mechanics are.... a new way to farm Obsidian after the point at which Obsidian has outlived all of its mechanical(non-decorative) usefulness in Singleplayer Survival Minecraft? Seriously??? And can we talk about how the Shroomlight is effectively a more easily obtained Glowstone clone? Just.... W h y ?
Warped Forest: A frankly boring, unfitting blue reskin of the Crimson Forest. I say blue reskin because practically every decorative block(I'm beginning to notice a trend) you could find in the aforementioned equally-common Crimson Forest can be found painted blue-green here. It has more of that same mushroom from before, too, I guess. Regardless, the lack of immediate danger is what really burns this biome for me. This is the Nether we're talking about here. The final step before the "End"game. The trial that which shall test the player in new, frightening ways to prepare them for the coming duel with the Ender Dragon. And yet, a lot of that goes away if the player's portal spawns in this new, disappointingly common biome. If it were rarer, it'd be like an oasis within a great desert; a treat to find, a brief reprieve from the terrors of the rest of the Nether. At the very least, Nether Fortresses don't spawn here. It'd be awful were that not the case.
Soulsand Valley: Another biome to overall avoid when playing the game, to be thrown in the same category as Swamplands and Snow Plains. However, while those two aforementioned other biomes actually have some potential for neat spots to build things, as well as a few unique features such as generated structures and mobs, the Soulsand Valley has neither of those redeeming qualities. Want to build here? Those Ghasts disagree, and as for what you might find here, the trend continues: a new directional decorative block that is a bit of a pain to mine, especially with the increased Skeleton(somewhat adds to the difficulty) and Ghast(most definitely adds to the difficulty) spawn count, and yet another new decorative block that makes.... two new decorative light source blocks, a new type of fire.... And let's not forget that the biome's Ghast infestation is not at all helped by the primarily Soulsand(will slow you down, making it harder to dodge Ghast fireballs) and Soulsoil(will ignite into Soul Fire when hit with Ghast Fireballs, and Soul Fire deals more damage than Fire already does) terrain. So, even if you reeaaally wanted that sweet, sweet Basalt, you just try and efficiently build your way up to the top of those pillars. Even if you use cobblestone and stair your way up, the blast will send you falling back to the floor, where the Soulsand is waiting to further slow you as you crawl your way back to the stairs, while yet more Ghast fireballs rain down upon you as by this point those buggers are showing up so rapidly that you've run out of arrows. There is nothing to be found within this biome that would in any way make braving its hyper-perilous landscape worth the average player's time.
Whew, rant time over. Yo, Mojang, can we get something other than decorative blocks? Like, I'm an avid builder and all, but I do like me some new and interesting mechanics and features that aren't solely decorative. And if we can only get decorative blocks, can we not make nearly half of them a recoloring of the other near-half???