E3M1 was an excellent opening level. It had the classic pistol fight against the mid-HP demons with turbo ammunition, that made it be id-like. The second part gave a real classic feeling, even if it didn't resemble to any existing id levels at all.
E3M2 didn't bother me at all. Even if it was quite homagish for at least 5 out of the 9 maps in the original E3 levelset, the ideas and realisation did enough not to blame Daimon for it.
E3M3 quite kicked my ass. It was one of the - maybe too many - maps that started off from a room being able to be walked around. But it wasn't the major fault at all. More likely the difficulty and those well-hidden secrets pissed me off. But, even if I died thrice due to some nasty surprises, I was fairly contented by that level, too.
E3M4 remained almost the same as it was in the previous release. Not bad, but its name is resembling to the one of the original. On average, the level was kinda nice.
E3M5 was my personal favourite of all. It was filled by lots of original ideas, and the realisation made it even better. Easily beats numerous classic well-playing levels of Petersen himself. The "Redrock Slough of Despair" or how to call that succeeded really beautiful and after the yellow key, it all became a fantastic, never experienced Doom feeling. Absolute 5 stars.
E3M6. I've already said my opinion about Phobus' Depths. Simply great.
E3M7 was rather brutal, but the expectations were fulfilled. The only thing that made my eyebrows yanked up was the blue door signal. That strange landmark reminded me of the E3M6 exit door or the E4M2 blue door, but neither of them were like this. Much more like for a new idea, still, as far as I would have been able to imagine something like this in an id level, I wasn't that shocked like a real buggy critic would be. Not to speak about ridiculously little details: liked it, but some parts were extremely strange.
E3M8... the classic Core. Power up, flatten out, nasty Barons, four-legged mutant spiderborg gets his last hitpoint cut off by the BFG aftermath. Shit's on the floor, yo.
E3M9 is more than likely to be moved from E3M6 of the first release. I wasn't aware of that pretty hard level either, the only notice is the starting note from my E3M3 review. Homageish, and? Nobody does perfect. Even E3M5 wasn't 100%. To be honest, this E3M6 clone rather fits the secret role than that level in the previous release, that more reminded me of some Oniria, in a bit of NoL style.