Sounds great to me. I'm not sure you'll be able to get easy development and simple plans with c5, and some other responses to e4. You won't always be able to play QGD against Nf3 and c4 (you could get into true reti and english lines, or other transpositions).
I've switched my opening strategy several times lately. I felt like I just wasn't getting good with d4, so I tried positional e4 for a while. I decided that's not so interesting, and maybe really not good enough (although some GM's do it). Now I want to get a strong foundation in 1.e4 e5, and slowly develop d4 openings.
I'm a little surprised an e4 player would choose QG against d4, instead of Dutch, Benoni, or KID. But maybe that goes along with your classical approach.
What do you think of adopting the most classical repertoire possible and go for easy plans and development?
What do you think of a classical repertoire as follows:
As white:
- 1e4 in simple lines with easy development and simple plans.
As black:
- Queen's gambit declined, against 1d4 1Nf3 and 1c4.
- e5 againts 1e4?
Probably is not very ambitious but also as they say "best by test".