What has TrainerRoad done for YOU lately? 
Guess since I started this thing I’ll go first…
My power improvements since I joined in Sept 2018:
5min +13%
20min +19%
30min +38%
45min +25%
60min +25%
In 6 months of TR training, I have transformed my:
5s power into my 3min power
30s –> 6min
1min –> 8min
5min –> 10min
10min –> 30min
20min –> 50min
30min –> 3hr
Two caveats:
i) I was a pretty flabby man-baby when I started, and
ii) I have no idea if this means I’m doing anything right.
5 min +7.7%
20 min +6.8%
45 min +1.8%
60 min +7.1%
90 min +7.0%
The 45 minute outlier was interesting. I can’t go back to 2016 because I was using virtual power back then. I will be 61 in May. My ftp has gone from 251 to 264.
I’d say judging by your numbers that you’re doing everything right. 
You’re faster and expect that your overall health and fitness have improved as a side effect. Congratulations 
and keep getting after it.
If only I knew. I started with an FTP of 189 in Fall 2017 and am now at 257. But my power curve really doesn’t say much before I start racing because I’ve been following structured workouts for the last 25 or so weeks, so not much opportunity to test the short-power range.