There never should’ve been a continuation of TLJ. Ever. The canon timeline, not just the main saga, should’ve just ended at the boy looking at the stars with hope. Period. End of story. Zilch.

Continuing the story and creating any new threats AFTER TLJ strips away any emotional impact from Luke’s sacrifice and inspiring the galaxy with hope, even if TFA and TLJ, themselves, remain untouched. Because what was the point of Luke’s sacrifice if TROS or DOTF or whatever continuation even exists? It was all for nothing since Palpatine came back anyways in TROS, or Kylo was gonna search for some planet-destroying Force ability in DOTF or the Resistance struggled against the FO in both Episode IX’s.