If a small tweak is legal and gets you more comfortable I say it's worth it. However, before buying a whole other gun I personally would make sure I have dry fired diligently. We've all had the "If I change guns maybe it will be better" thought. Generally, it comes down to enough practice.
Case in point, I just recently parted ways with my CO Shadow. PHENOMENAL GUN. However, I could just never get comfortable with it. They just are not real comfortable for me. I decided this after shooting 10's of thousands of rounds over the years through a few different ones.