Agree - how would a loan to the Portuguese league benefit us...Don't think there will be anything in this story. He doesn't need a recharge, he just needs time. He was coming into some consistent form at the end of last season, was our best player in the narrow home defeat to City and in quite a number of games in the run-in last season. He showed signs of developing the consistent quality that we all hoped he'd deliver when we bought him.
So what he needs isn't a loan to a Portuguese club (which for him would be a massive slap in the face and a sign of a career on a sliding slope - good players move from Portuguese football to England/Germany/Italy/Spain, not the other way round).
Lamela appears to be on a slow but ultimately upward curve in terms of his Spurs career and we just need to stick with him at this point in time IMO.