Has this game really been out for almost 4 years? Damn. Well, it's nice to have an F2P MMO you can drop for a year at a time and not be totally out of the loop. We started back in around the beginning of this year and have been having a good time. I think the game deserves a new "review."
Graphics and Aesthetics: still "A F2P game should not look this good." While earlier Warframes and weapons suffered from some design issues, the latest creations are some top-notch work. Such as, Frost Prime (a ++ version of the original Frost Warframe and the first publicly available Prime Warframe) was aesthetically way too similar to the original with just what looked like the helmet from a popular enemy you found. While still a great Warframe (I use to this day), it gets put to shame, design-wise, by some of the newer Primes. DE (or whoever they pay for their model work) has improved vastly over the years. While older designed look "dated," it's nothing like going from Legion to classic zones in WoW. But it is noticeable.
The UI and other non-combat gameplay aspects have really reached a "finished" level. This game could get "released" at this point as there's very few placeholder settings that I can find.
Gameplay: many "original" missions are either untouched or just been "spiced up." There's been some new areas added with the story quest. New enemy units. But the core gameplay of Cyborg Ninjas in Space is still there. The original thread covers most of this.
Progression: They've "streamlined" the new system. The star chart has been overhauled once again and looks professional if not a little hard to read at times. You now complete missions and challenges on a planet to unlock the junction and head to the next one. Rewards for new Warframes contained in "quests" have been mostly taken off the market and put into this progressions system. New "powers" have been added indepedent of the Warframe but require you to complete sections of the "Main Story" quest.
Plot: There's a plot now. It's.... pretty fucking stupid, but points for semi-originality. I will spoiler it, but it's not exactly Asimov here.
Then the "War Within" happens but that quest is awful both from a gameplay and story-telling standpoint.