You're absolutely right.
A proposal from me:
Stage 1) Echelon/sprint stage. Start in Bruges, end somewhere at the coast
Stage 2) Start in Kortrijk or so, first Rodeberg etc. in 'Het heuvelland', small trip to France, go arounde Lille, include Pavés de Cysoing à Bourghelles, Bourghelles à Wannehain, Camphin-en-Pévèle & le Carrefour de l'Arbre. Back to Belgium, and end in Ronse (include a hill nearby the finish)
Stage 3) Time Trial: Oudenaarde-Zottegem, with Wolvenberg, Kergate(Mater), Haaghoek, Leberg & Berendries.
Stage 4) Ardennes stage. Do some famous hills of LBL and FW + some unknown.
Stage 5) Stage in Brabant, some hills, end on a avenue in Brussels -> majestic sprint.