The last few months, I've been using my mirrorless cameras way more than my 5D3. Main reason is I'm somehow not so happy anymore with the iq of my Canon. The lens I use most is the 24-105L. I also have the 70-200IS/F2.8 which is amazing but way too heavy for daily use. But I'm wondering if I'm doing injustice to my 5D3 using the 'inferior' 24105L. I am very much considering to sell the lenses I have now and invest in something that might give me better iq and is better suited for my pictures (lots of indoors, kids).
Any advice? I was thinking about the 24-70/F2.8 (which I still find very expensive), or maybe a prime like the Sigma 50/1.4.