Zero sarcasm. I am greatly enjoying your scenario. Yes, the weapons appearance is subpar in relation to the rest of the impressive graphical designs. But that doesn't really matter. The weapons are so much fun to use. I always loved the M1 alien weapon, so it's great to have it back. I don't know why people would complain about the Pfhor textures, I think they look amazing. It's nice to see some bright colors. Haters gonna hate, I guess.
I tried the "Sahkmet Rising" terminal three times, and each time the game crashed. I probably would have gone on the "failure" fork if it hadn't, and honestly I just browse through terminals so I wasn't even aware it was trying to take me away without completing Tycho's mission.
When we have scenarios like Phoenix, which features impressive level design, I actually appreciate the more simplistic map making found in Eternal. For instance, I find the fun factor much higher in these Eternal levels than in Phoenix. Sure, its missing the meticulous attention to detail and large, sprawling design, but I find this actually to be a blessing. It's so much more true to Marathon than in most scenarios I've played.
I also want to add that the HUD is totally, completely awesome. One of the many reasons why Eternal looks as good as it does. And it's fun seeing M1 era aliens again. Even though the graphical quality of the S'pht, for example, is much better in M2/Infinity, it's still cool to see the old types again. And their projectiles look great. Again, this is just a great looking scenario, and the most fun I've had playing third-party scenarios in a long time.