Personally, I think TI wider time slot would be good, such as the 8am-12midnight that is available on weekends. I see no purpose in restricting that event.
The other event timings are decent. 7pm-10pm Matsuri, 7.30pm-8.05pm Sage World, and 8.10pm-till 9 tail dies. These timing are in line with after work hours of general population. If you're in a profession that works out of these hours, then it can't be helped, you're the minority.
As for the Convoy and Plunder, I would disagree with you on that aspect of making more time slots. If that happens, the plunders are going to suffer because as it is, it can take almost a full 3 hours of that event time to get plunders in, and its constant clicking. If you spread more time slots, that means more chances of convoys to sneak past, and mouse *ons will be destroyed. HOWEVER, if they do ever decide to increase the number of SS convoys, then yes, I would agree with more time slots then.