I use mine all the time for field checks and dinking around on the bench. I've yet to find anything in RC that would commonly push the ds1054Z, and you'll find having 4 channels is a huge bonus when playing with motor controllers.
A faster scope is just that, for accurately viewing faster signals or very quick glitches. Expensive stuff comes with the bells and whistles though, like fancy decoders and slick interfaces. That said, the ds1054z does have a decent decoder (it just sadly only works from the trace buffer and not full memory). I've used it to debug an SPI bus between a windbond flash chip tlc59711 and a micro. Worked well considering the memory limitation.
But back to RC, a 2k series anything (be it Tek, Rigol, Siglen, Agil..err..Keysight), will be overkill and a good deal more pricey. The little ds1054 has been great for sorting out rc glitches, checking for signal line interferance, fixing/checking parts (regs, receivers, servo controllers, etc). Dave is right, it's epic for the money you'll be spending and will likely be plenty of bandwidth.