I’m a fan of the tri plans, not been tempted to do cycling only yet. When it comes to the Long Distance I don’t believe in too little swimming or too much running, but you definitely need all three on form on race day. You’ve got some time to play with before starting a FD plan to hit the Austria date so do what you enjoy, but be cautious with High Volume, I ruined my 2017 season that way.
IM Austria should be a day to remember, let us know how your training progresses: