I think it did. I am having very poor dreamcast emulation under the latest version of Batocera as well. It was running very near full speed at 320×240 resolution. The option for that resolution was removed from the game options in Batocera also, but it is still available in retroarch’s settings. 320×240 is a low resolution, but I would rather sacrifice game resolution to gain better performance most of the time. But with the latest build of Batocera, at 640×480 I get about 50% or less speed, and about 75% speed with 320×240 and frame skip of 1.
Really hoping dreamcast emulation will improve with the next version of Batocera, as this was one of the main reasons I got the Odroid, after seeing several videos of good dreamcast performance.