I concur, Mike. I simultaneously had smoothy and newbie TV Plossls. I kept the newbies. Better edge correction. More neutral tone.
The earliest version smoothies had plano eye and field lenses. The TV Plossls with concave outer surfaces have better edge correction. Could your smoothies have been the old plano type? I have a mixed set of TV Plossl smoothies and newbies, from 7.4 to 26mm. All of my TV Plossls have concave eye/field lenses, and they all have very nice edge correction.
I haven't noticed a more neutral tone in my newer TV Plossls. To my eyes, all the TV Plossls I've looked through - smoothie and newbie- have the warm, amber, "coffee" tone. I like that tone for Jupiter belts and lunar maria. I'll have to check out the newer ones to see if the tone is more neutral than the smoothies.