Glad your flap works well. I had my surgery 9 months ago and yes, my speech is up and down. The flap doesn't swell but the tongue is stiff sometimes and I'm very conscious of it. It looks pretty gross and I'm hoping there will be some improvement over time. Like you though, I feel fortunate to have come through with such good swallowing and speech.

1996, ovarian cancer surgery + cisplatin and taxol.
September, 2007, SCC of left lateral tongue. Excision.
October, 2009 recurrence in scar tissue, T1NOMO. Free flap surgery from left wrist - neck dissection. 63 year old New Zealander. No chemo, no RT.
February, 2014. New primary in left buccal mucosa. Marginal mandibulectomy, neck dissection, right arm free forearm flap. T1N0M0 but third occurrence and some areas of concern: RT started 8 April and finished 19 May.