Heung-min Son had been saying for a long time that he wanted to go to MLS. With the recently confirmed news a couple of minutes ago, he has joined LAFC. He had played at the top level for many years at Spurs, but now it was time to move on. This will be a pleasant end to his career. The quality in the MLS is comfortable for players of his age. There's no Premier League pressure. They play for fun and also earn good salaries. Son made the right decision.
This is very surprising news, as we hadn't heard any rumors about Son before. His departure will leave a huge hole in Tottenham squad, one that will be very difficult for any other player to fill. Son has played for Tottenham for a decade, and his decision to move to the MLS was indeed the right one. Son played his final match against Newcastle in a friendly in Korea, a very emotional farewell.
We will see the impact of Son's departure from Spurs, because so far he has been one of the keys to Spurs success. I also agree that after Son leaves, it is unclear what Spurs will do to fill such a vital void in their squad. Finding a loyal successor like Son will be quite difficult. Kane left first and now Son, so I think Spurs could struggle next season.