Thalassicus
Bytes and Nibblers
Well, there's also how we can just move over tiles to see what's there. It's not just a problem with subs though... reveals barbarian encampments.
If you wish to only use the Unofficial Patch and not the rest of the package, it's very simple to do. Please see the "disabling mods" section at the end of the Combined post here.
Yeah, I guess it's more a problem with the game's core. The increased gold I'm seeing may be coming from the fact that big cities are more viable now, so I'm growing larger overall populations. I think the problem may be that expenses are pretty much static per building, but population directly increases income by working tiles with gold output, as well as increasing trade route income.
I still wouldn't be opposed to increasing building and unit maintenance further.