That's great that you have specific goals and an outline for the whole season. It helps you focus on the now, knowing that in the next phase of your annual training plan, you know what you'll be aiming to do.
There seems to be a big jump in volume between your off-season and your pre-season phase 1. Going from Z1/2 on the bike to 5xweek of Z4-6 is potentially a recipe for disaster depending on how quickly you jump into it. Try to minimize risk but addressing strength/flexibility limiters in the offseason and getting a bike fit if you've never had one, evolved a lot as an athlete or had any injuries, etc.
What race distance are you targeting doing? Building up to 100-150% of race distance in pre-season phase 2 is good/bad depending on that.
It's definitely an aggressive plan to cycle 5x week, swim 3-4x week, and run 3x week, but achievable if you balance the intensities and volume to make sure you hit your key sessions weekly.
More thoughts:
- Are you going for the 3 weeks 'on' 1 week recovery route? You may want to put something down about how you build your volume
- Put some notes down on limiters and how you plan to address them (e.g. not flexible to get into a comfortable aero position; got a dead spot in your swim stroke; got a lazy kick on your run; etc.