For light leak issues check this post (and read whole topic if you wish):
Also take a look at this topic. It’s a hidden gem:
Eevee is straight up good in scenes without global illumination. Most use case is for that as well. And it’s true that it has some ‘learning curve’ to it but I think it’s worth overall (Especially if you’re rendering lots of stills and animations).The most challenging thing is there isn’t a good tutorial related to arch-vis in Eevee yet (Except the link I shared above). You can see that render qualities are pretty close in his topic. Sometimes even better in Eevee with a better lighting setup (I don’t even mention render times).