I just finished the Malfurion Quest 1.4, it was very long and I must admit I like it, of course the ending was the one I dislike, how evil and twisted Malfurion became, I coundn't believed.
For the gameplay, it was awesome and intense, the first chapters were kinda hard because the enemy was attacking the units I had and that annoyed me that I had to save in every moment but somehow I manage it, the last chapters were super hard to surpass but thanks to the Legendary Items I manage to surpass them, I mean, like everyone against you WOW, and I do like challenges and I like the new units, for allies and enemies.
For the difficulty choices, I'm fine with this, putting everything that was on Insane in Hard was the best choice, not just for the codes, but the playability and strategy and the rest because, like I said, it was intense.
For the story, I will only say that Malfurion was doing everything just for his ambitions, ever since he comsume the corrupted well, with every chapter he become more vile and despicable, it was tragic and evil. When I got this kinda of games with two paths, I always choose the bad path because I want to finish the game with the good path and you made the right choice to do it.
I found some mistakes while playing, some words are bad written, in some interludes Malfurion had a Brilliance Aura instead of Affinity Aura and 2 Orbs of Fire and I hadn't pick them, on the last chapters when I finished a chapter as Twisted Ancient, I appear as that in the next one and he supposed to start as Malfurion, right?
Anyway, I heard that you are working in a new patch or version to fix these mistakes and bugs, I'm not sure how long it will take because I want to hear news about the development of the Sentinel Storyline because I want to finish the game in a good way, you know what I mean. Also I might have some ideas that you could consider, if you want.
And at the end: Excelent Work for both of you!!! Keep like that, we'll be cheering you up to finish this magnificent campaign!!!