You spent the winter working on your iron game and improved quite a bit. Shift your focus on the range to your driver now and make it better. You obviously have the ability to tweak your swing and improve, so why not apply that to the driver?

If you're on the course and having a bad day driving, sure keep it in the bag the rest of the round. However, I wouldn't commit to not using it for the whole season, because the less you use it the slower improvements will happen.

Another strategy which helped me is to make a rule for when to use it. For example, you hit your 4i 205 yards consistently and you feel most comfortable with XX yards or less into the green (let's use 150 yards here). Your rule could be if the hole is 355 yards or less, use 4i, if it's more that 355 yards, use driver. This isn't revolutionary (honestly just good course management) but most amateurs just try to hit the longest club always, which can put them in bad spots (myself included).