Just thought I'd chime in here since I have ridden the Strada for a bit as the 3T Distributor where I live was kind enough to let me take it out extensively.
This bike is one of their pre-production demos going around so the final product will probable change in some ways, hopefully
Build quality: Very nice, much like the Exploro. While the Black color like the Exloro is higher-end version, the red is the star color on this frame.
Gearing: As it is right now it's not as bad as you might think. On paper its one thing, riding is another. The new cassettes will be greatly welcomed but it's still capable as it is now.
Geometry: My main bike is a Cipollini NK1K for reference. The Strada isn't as aggressive as the Cipo up front, especially with a taller headtube, but those that compare it to the S5 wouldn't be far off.
Tire Clearance: Here is where it gets interesting. The Demo bike comes with Continental GP4000SII 28mm but when you pump them up to their max the wheel rubs heavily. I think it's been said here that the tires aren't a true 28mm and more like 29 to 30. Other 28mm do not have this problem.
Because the tire clearance is so minimal, the frame tends to knock any gravel off the tire before it gets jammed between the tire and the frame.
Like SuperDave mentioned, if you are really concerned, going down to a 25mm tire will give you more clearance, but this bike is designed to go with 28mm.
Now my issue with the bike isn't so much with tire clearance, gearing etc., its to do with the brakes and the flex in the frame.
Disc brakes are fantastic for stopping power, aerodynamics etc, but the frame does flex and when that happens the discs rub against the brakes which have minimal clearance, to begin with. The brakes are SRAM btw. Shimano brakes have more clearance between the pads and the disc, thus reduce the risk of rubbing. SRAM brakes leave very little room for frame flex, thus causing some loss of power and rotation while riding.
Hopefully, the production frame will address this by either making the seat stay and chain stay stiffer or work with SRAM on the brakes.
Overall, the bike has grown on me over the couple weeks I have ridden on it. It's a bike you need to ride first before coming to conclusions. From what I read here and heard, excited to see the final production model.
BTW I do not work for 3T or have any financial interest in the company, just in case you are wondering