Hi again, kuha,
Is day one the day that you arrive in Edinburgh? If so, you're not going to see a lot as you'll most likely be pretty wiped out from the overnight flight. However, if that is actually day two, get a good night's sleep the first night.
If you are heading to the Trossachs after Glencoe, Loch Fyne is pretty far out of the way. Unless you have a specific reason for visiting Loch Fyne (Inverary Castle? Kippers?), you may want to eliminate that section of your itinerary.
If Calum's Seal Trips are still operating during your time in Plockton, I'd highly recommend it. That, and Islay and Colonsay, were among the highlights of our last visit.
As has been pointed out, there's not a whole lot to do in Glencoe if you're not planning to do a lot of hiking. A day and a half would be more than enough.
Edinburgh is worth at least two full days.
The ferry to Tarbert departs Uig at 9:30. Arrival in Tarbert would be at 11:10 a.m. You'd still have enough time to do a tour of the island, but you'd have to be very specific about what you want to see. Make sure that you don't sail out on Monday, Wednesday, or Friday, as there is only one sailing at 2:10 p.m. Also, if you take the 16:20 out of Tarbert, it doesn't arrive in Uig until 18:00, which means that you'd still have to drive all the way across Skye in the gloaming, and you would most likely not reach your lodging near Glencoe until well after dark. If you plan to take this route, you may want to consider staying somewhere like Kyle of Lochalsh, or even as far as Invergarry, before heading on to Glencoe in the morning.
Don't forget that the roads are not fast. What appears to be a relatively short drive usually isn't! :)
Hope that helps in some way. Have a wonderful visit, and I can say without doubt that you will definitely return!