It's surprising how much color he (she?) has lost there, compared with how he was as a larva. He looks OK to me...but then sure, it'd be nice if he was plumper. How and what are you feeding him?
I've currently experiencing an over-population of ensicauda larvae and metamorphs, with more morphing every day. Feeding them takes more time than anything else newt-related that I do. It'd be fine if they all ate food fed by hand as readily as my T. marmoratus babies, but such is not the case.
I really need to secure a cheaper, more stable supply of cricket hatchlings if I'm to raise them properly. They're getting some crickets now but mostly wax worms. I'm playing with the idea of raising some of these ensicauda in my garden where food items are plentiful, to see how they fare out there. I'd need something that's escape-proof and predator-proof but allows tiny insects to move in freely. I'm currently considering a 2-meter-long, 1-meter-wide frame, about 20 cm. high, with a secure top and screened sides dug into the soil.