Slow transactions times and fees are not really the main issue. I think most of us have unrealistic exceptions for Bitcoin, we cannot seem to let go of the past. It was once a promising crypto for day to day purchases but its value over time increased dramatically and so made it too valuable to spend. I can't see this situation changing, not unless Bitcoins price stabilises in the future, but I can't see that happening. Slow transactions times and fees need to be improved, but if they do it won't change the uptake of Bitcoin for day to day purchases.