Zimmerman will most likely become an elite 1st baseman when Rendon pushes him off third. Probably best for Zimm's health too. Remember that Zimm started out at UVA as a 3B/SS. He will probably end up being a Gold Glove 1B.
I don't doubt that he'll be there eventually, but it seems a bit premature.
Lombo gets on-base as much as Espinosa.
If you're not comfortable with Espinosa leading off, you're not going to be comfortable with Lombo leading off.
Ehhh maybe this year. With regular ABs and more experience I'd think Lombardozzi could get on base a little bit more. Probably up to .330 or so. Espinosa could improve too.