I visit CR daily(10-20 times a day). I have seen 100ish similar questions - many members end up selling crop body after getting FF (5D, 6D, 5D II, 5D III, 1D X). The IQ of FF will blow the t4i away. Your t4i will stay in the bag and collect dust. Same thing with 24-105 owners, after getting 24-70 II.
To save you time and money, sell all the crop gear as fast as you can. Use that money toward to future L lenses. 17-55 & 10-22 are wonderful lenses for crop, but they still can't match with L lenses - from IQ to build quality.