Magic has a Keyword name and theme problem. (Start Your Engines and more)

Mechanically I quite like "Start your Engines". It seems slow (heh), but the idea of building up something through attacking is great. However, it is pretty terrible on the new Hazoret.

I REALLY like "Collect Evidence" from MKM. I think it could be one the greatest keywords we have had in recent times... but why are they going to need to Collect Evidence in Dragonstorm? Or on Lorwyn? So it wont be there.

I think Cases are a mechanically interesting thing but how many sets are going to have cases TO solve?

Ninjutsu is very clearly only tied to Ninjas. But the "revelation" of some creature being another isn't just tied to ninjas - it can many things. You let a strange into your home and then you let in the Vampire! Imagine an Angel with Ninjutsu that you could only return a Cleric to your hand.

Descend is clearly in line with delving down into the Caverns of Ixalan. However as a mechanic I think it would work for Golgari on Ravnica. But I don't feel that the Golgari Descend.

We wont be seeing Trials and Cartouches maybe ever again. But I think that would be a cool think to explore on other planes.

Exhaust I think, is lucky. It was chosen because of "car exhaust" I assume, but you exhaust a resource so it gets a pass.

Rad counters from Fallout. I'm pretty whatever on Rad Counters, but they wont be using those again, right? Like ever? Radiation seems like something they will be shying away from if I have to guess - but I could be wrong here.

Treasure and Food are a semi-staple nowadays. However Blood also played really well! But... when is the next time they would think about Blood that isn't on Innistrad as the sets token of choice. (I do know that Blood was in The Big Score on Transmutation Font)

I don't really have a solution here other than them maybe being "more confident" that their ideas are good, that they will want to use them again in interesting ways so they make the name more generic. Overload was an Izzet Mechanic but now it is in all 5-colors and Overload is so sick. But imagine if it was instead called "Massive Energy" or "Experimentation". I doubt we would have as many if it weren't generic-enough with "Overload". I get that there are only so many words and ideas which we can attribute to new mechanics but I really wish they would be less plane and/or set specific.

As for my "well then what is your name for Start your Engines", I would pick "Velocity". I don't think that's GREAT, but "When you have Maximum Velocity" is nice, and I think it's better for all the things the mechanic will be on that, you know, don't have engines.