Tbh personally I love this change. While it was great to A/B test "learn more" and "shop now" I always hoped we could get a middle CTA. The problem I had with "Shop now" was it implied a commitment so CPM tended to be slightly higher, but with "learn more" even though more people clicked, slightly less people converted.
This change is actually really beneficial to me because now we have the perfect CTA for ecommerce! I noticed last night my CTA was slightly higher because of it, while it's not the biggest change I'm sure the more we test the better we will preform.