Audiotent Tip 334. Compression to alter the width.
There are a few ways to affect the width of your master. One of those is mid/side compression.
Try using it to bring back the focus on your wide mix. First, insert your preferred mix-bus compressor (with M/S functionality available) on your stereo output.
Secondly, apply light compression to the middle (centre) signal only. Finally, bring the wet signal up until the focus and punch is regained.