I live in one of the country's tri capitals, so I coach a fair number of triathletes on the running side of things (although none as good as you). At best, they tend to give me 4 days of running, which usually means a track session, a tempo session, a long run and an easy distance day. Sometimes I get a 5th day of easy distance out of them.
You're the elite triathlete here, so I am not second guessing you here, just sharing food for thought from an experienced runner's perspective. It would be great if you got in some simple easy distance runs once or twice a week, and had hard running only twice per week. Even those of us who only run usually take the approach of 2 quality days per week. If crunched for time, you can certainly combine the long run and a tempo effort by way of a nice progression run, which I do during marathon training. But going hard three or four days a week is more than I would advise.
As a side note, with the triathletes that I coach, I tend to give them partial mileage credit for their time in the saddle and pool. I use the pretty typical "interval volume is capped at 8% of your weekly mileage" rule of thumb with my runners, but for triathletes who are putting in big blocks of time on the bike or in the pool (more on the bike than the pool though), I let them throw down more intervals than I otherwise might. Someone in your position can handle up to 4 miles of intervals despite your low running volume.