I tried this yesterday with my Oly em-d 5 mkII and founded +1 usually OK but +1.7 often not OK, taking cityscapes on a bright morning with sunshine and clouds. Cloud highlights blew out too easily, or at least became far too bright for my taste. But then I tend to prefer more somber shades.
My experience is that strong ETTR can introduce a few gotchas, at least with my Oly: skies can become too cyan, for example, and some images require quite a lot of PP to get things back into balance. Highlights reduced too much in LR can acquire a sickly, waxy look, at least on the honey-coloured stone around here. I can see this being a fair system for shots with a wide DR where I know I will need to raise shadows a lot, but for more general shots I'm thinking that sticking with the camera metering is a simpler system, albeit adjusting for bright and dark scenes where reducing things to an 18% grey will give an incorrect exposure (snow, black doors, etc). Or maybe +0.3 or 0.7 for general things, but not going for broke with +2 - too much work in PP.
Bracketing and then combining using LR's HDR feature is another way to do this, especially since LR now outputs a fresh RAW of the result. That way, I still have a useable shot at default settings even if the second one is blown out.