Advice on cad

I recently paid for a ring and just received my cad and I like the cad but I feel like I’m missing something and don’t wanna say ok yet. This is for my girlfriend and the occasion is our 3 year anniversary so I want it to be perfect. Could I get some advice? I put a picture of the cad and then an inspiration of the ring, I slightly changed it. Thicker band, I told him I’d want 2-3mm band and also a 5ct stone instead of 3ct