>>536753361
I think they suck too but they have their use. I ditched them though and haven't looked back.
>>536753608
You should, they are quite good, easy to work and a big step up from the built in lights. Being able to see where they are placed in the worldspace is incredibly helpful for adjusting them.
>>536753664
I know how to use RTGI and I will stand by that removing it from my stack was one of the best things I did. RTGI messes up colors, darkens the whole scene unless you accidentally look at a light source. Unless it can become true raytracing and properly take over the lighting engine it's going to remain problematic to use.