From all the reading I’ve done race pace on 70.3 race day is around 80-85% of FTP.
Going off that there are a lot of 80-85% 60-90 minute workouts in every week of the base plan. These prepare you well for race day riding at a continuous pace and then running after. Most other workouts are shorter intervals above race pace. I’ve never seen another training plan that includes a lot of race pace workouts.
Same thing in Build except they go from 90-120 minutes.
In specialty these workouts kick up a notch by the looks either 80-90 or 85-95%.
Training at that pace is a bit of a grey hence why its only one workout a week. The main workouts in base work out your muscular endurance for up to 20 minutes at ~90%. Build raises your FTP and specialist puts the icing on the cake.
You wont get much guidance on running and swimming paces with TR. Race day swim pace would be around your CSS. Running would be your open half time +3-5 minutes depending on running experience and speed.