Coming from PP8 and some other mid forward IEMs the ES5 indeed does more relaxed in the midrange. Not as relaxed as AKT8ie in the mids though, vocals seem a little bit more forward on the ES5.
The ES5 has a light V-shaped with a sub-bass emphasize. I would say the V-Shape is pronounced as much as the PP8 with both switches on, so very gentle V-Shape
While the earsonics has more subbass rumble than the PP8, the PP8 goes deeper showing better technicalities( minimal though, both are very high level).
I wouldn't dare to call the ES5 bright. Treble extension is very good, isn't as airy as Andromeda but at the same time never approaches sharpness. Treble tuning is spot and I would rank them besides the PP8 and Andromeda as the best I've heard in an IEM.
Soundstage expansion is somewhere between PP8 and Andromeda, leaning more on the Andromeda size which is HUGE, with good imaging and depth.
To sum it up the ES5 is definitely worth its price and an IEM to consider. If you are looking for a well tuned IEM without treble roll-off and any mean peaks and sharpness, then the ES5 might be the one you are looking for.