It's a matter of using whatever works best for you. In your case seems to be the Tsunami. I tend to think of them as close to bullet proof as you can get.
Randy, I get it, but with my heavily weighted cars, and my grades, my Tsunami's are very much aware of when its lugging vs coasting, but I admit, most layouts don't have the grades I do.
"The true sign of intelligence is not knowledge but imagination."-Albert Einstein
http://gearedsteam.blogspot.com/
The big advantage remains that it is manually activated rather then dependent on the BEMF load on the motor, which is pretty meaningless unless you actually use live loads on your layout. There's just not as much 'stuff' happening on a steam loco compared to a diesel so there's not as huge a leap from the 'old way' to full throttle with the steam vs the diesel version.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Matt Herman gives a 30 minute demo on the new Steam version of full throttle for those whom have a subscription to TrainMasters TV.
Personally, my opinion, not a big deal as compared against a Tsunami II Steam DDE, and not as impressive as the Locksound diesel "Throttle Up" feature as far as setting the bar, but still interesting. To me ESU scores higher on their actual sounds (whistles, brakes) decoder size, and of course, Matt is a natural salesman who knows his stuff.
Just an FYI for those steamers interested in seeing this in action.
Edit:removed the link in case it violated forum policies.