Eh, not really.
Sure, Blightcaster lost healing and other spells, but they got just as many new ones;
Yeah. The problem is... some of them were totally useless before Blightcaster and remain being useless after. Especially the acid spells that mostly present in DDO as some kind of a "fog" type of spells. Stinking Cloud/Acid Rain/Cloudkill/Acid Fog - cast those if you want to learn a lot of new swear words from your party members who won't be able to see something due to those spells cover their screens.
Enveloping Swarm ? Creeping Doom ? Insidious Spores ? Who would use them ?!
That druid lost heals AND pets. Even the dark cleric didn't lose heals.
That was my main concern when Blightcaster were introduced. After I've tried it, the healing spells they let us to use with Blightcaster are actually enough. (Well, I'd still like to have the Heal spell...)
Rather than healing spells there are other issues with Blightcasters here and there.
It's Enhancements tree is a mess. Defiled Growth/Outbreak/Poison of the Hydra literally buff 1 spell each and give nothing when you'll outlevel those spells. Also they buff different playstyles (different Druid's forms) and have zero synergy with the SLAs. (Guess it won't be changed. Ever. Looking at how they've changed Bombardier Alchemist, having completely random Enhancements that don't work with each other is DDO's new reality...)
A "normal" Season's Herald druid needs to raise different spellpowers. Like 3 of them at the same time. From the other hand it's not that hard. Blightcaster requires players to raise different spells DCs ! Acid Sparay is Evocation, rest of the acid spells are Conjuration. Thorn Blade - Evocation, Grasping Thorns - Transmutation, rest thorns - Conjuration. Poison/Contagion/Insidious Spores - Necromancy... What must a player choose ? Don't forget those Enhancements that buff some of the said spells. And we literally can't skip some Enhancements just because we need to put action point somewhere in order to open new tier !
Got the separate Enhancement for Thorn knight but nothing for Hive Master.
Nothing to replace Elemental Form Specialty and Wild Force feats.
Those are ones I can remember. Probably has more. Still, quite fun to play.