I had a marine group 27 Exide Nautilus battery from ~'04 to '07. That thing was an acid spewer, from the caps. It retained its capacity surprisingly well in deep cycle duty compared to the wally world marine batteries I was using then.
I think it required lower absorption voltages than most marine batteries, and my vehicle's voltage regulation back then would allow 14.9v after start up and periodically 14.9 for no particular reason, even when hot. These higher voltages do cause more aggressive bubbling on flooded batteries which can push electrolyte past the caps.
I have found most flooded marine batteries in general need 14.7v or higher absorption voltage to reach full charge in a reasonable amount of time, so this old marine Exide was likely an exception that would probably have been been happier receiving 14.2 to 14.4v until full at 77f battery temperature.
I've No personal experience with more modern Exide batteries, and therefore no opinion on what's currently being made by them, and pretty much disregard other's opinions unless it is on recently made batteries, and still take that with a grain of salt as few have any idea about what a battery needs to remain healthy, or any way to judge its capacity or CCA retainment, much less the tools and knowledge to do so.
Leaky is another thing though, if overtightened clamps are not the cause.
My marine Exide battery did not leak from the posts, but from the caps. I used the threaded studs and wingnuts for my connections, hard to overtorque with wingnuts and fingers.