That's awesome solosal! I've hiked the WUT and Highland trails multiple times as well, but have yet to hike every day trail and the Eastern Pines - one day...
As for future adventures, here are a few multi-day ones that come to mind:
Killarney - the Lacloche Silhouette trail - about the same distance as the whole WUT, but more difficult terrain in many spots. The views at the higher elevations are absolutely breathtaking, and some sites in particular offer jaw-dropping beauty.
Lake Superior Provincial Park Coastal Trail - Fantastic coastal views and various forms of beautiful, rocky terrain along with sandy beaches througout. Some very difficult sections including rock-hopping and scrambling. The northern section is more remote - we parked our car at the main lot at the south end of the trail and took a '4X4 taxi' to the north end. We hiked further north, then back all the way south to the car - what a blast! We plan on going back that way one day to do the Pukaskwa trail as well...
Bruce Trail - Tobermory to Hope Bay - Amazing escarpment views of Georgian Bay abound all along this section. A real visual treat. Camping is somewhat limited, and is outlined in the Bruce Trail guide. We stayed at the Storm Haven and High Dump sites in Bruce Peninsula National park, took a break at a B&B, and then camped at the free areas at Reeds Dump and McKay's Harbour. Note that there's a camping option between High Dump and Reed's Dump.
Cheers!
Rich