Well depends really. U can sorta watch it from few different perspectives.
1. It would be better as downloadable version, also way more risky one. Making it on steam is questionable because of investing/budget.
2. Webgl gonna earn however u turn.
3. FRG spent years on making FFT and yet they didn't want to pay extra for daily data save.
4. Also FFT was still earning with cheaper servers.
Now, thats some logical thinking, not what I would like to see. If u ask me, I would go for older player base, steam, making events/more competitive/tones of cosmetics and push FFT in direction what FRG sorta had in mind but never been able to do. Looking at FFT as game itself, mechanics and rest is making me think how it should not be as free browser game at all and how it's not made for really young population since it's not some short period game, 'just to play for 15 mins and log off'.