We are jumping rather late into Google Expanded Ads. Our conversions and quality scores have been good, so it has not been a major concern, but Google offered to create some new ads for us, and we were interested in what's Google Design Team would come up with, so we gave it a shot.
Google came back with ads with some quite flowery language, which is the exact opposite I was taught.
I was taught that Google Ads are supposed to be direct to the point, point out your strong selling features, bypassing the superlatives and flowery language.
For curiosity I ran the Google ads, and my CTR almost doubled, however as I suspect, the conversions didn't move much.
Looks like Google is writing ads to increase CTR, which put's more money in their pocket, but it's the conversions that put money in my pocket.
Looks like I will be doing the Expanded ads manually using best practices.