That's what worries me xD If the solution is to simply—add a filler arc, let the manga get ahead by like 3 chapters, animate those 3 chapters, repeat—then this will be even more unbearable than Shippuden was. This may sound hypocritical, but I'm actually not against filler. It's a necessity, and if used correctly then it is more than possible to get filler arcs with great stories. But there are times like a show will come about like Naruto or Bleach where they take advantage of this necessity and this leads to filler abuse (lmao). Part of what leads to dogsh*t filler episodes is having to take so many frequent breaks from the canon to tell filler stories; and unlike the canon, I've never heard of filler arcs which plots are paused while the canon is animated and then resumed once the need for filler returns. Usually filler episodes are self-contained stories (for efficiency) or maybe have two-parts and sometimes an entire arc is planned out. Who knows, maybe my idea of planning out a long-running filler plot with a great story rather than individual episodes is the key to having the best of both worlds.
Plus, I don't know I guess I'm the only one with this mindset (as I've repeated myself quite a lot across various threads), but I don't view the current Boruto anime arc as filler. Nor would I consider any other arcs set in the academy days filler, since the academy days are a total grey area in the timeline. So I see the episodes as filling in that necessary gap and typically speaking they have total freedom to do whatever they want really since most of these side characters we don't even see in the Movie or the manga. Once they start having to create filler outside this little bubble they have though, are we going to keep getting decent-great quality stories or are we gonna pull a Shippuden and start having adventures with ninja Ostriches?