These banners are only good for people who are ok with any 5*. The wyrmprint/dragon/adventurer ratio is the same for any banner(3/1.5/1.5 vs 2/.5/.5) so the wyrmprint 'spook' hasn't changed. Essentially, you do have a higher chance to get more dragons/adventurers than a regular banner because you are going to get more 5 stars.
The featured unit is at 0.5, which is like the focus on any regular banner. I wish they'd at least make the focus half of the 5* adventurer rate (.75) because trying to pull for the featured is essentially the same as any banner.
If you're talking about efficiency, then you should pull on gala banners because they will give you more 5* in general vs a regular/limited banner.