Know what you are training for. A short quick sprint or a long ride with lots of hills. Even for a TT bike level and all out will be different than hills and all out.
But as long as your numbers are getting better and you like the way you are doing what you are doing. Then keep on. When the numbers plateau, you might need to change something. Sometimes it's just a temporary change.
And if you use a coach, are they just for one thing? Or are they looking at all you do toward what ever your goal is. If they are looking at the bigger picture, then trust them before us.