Pricing for Pro subscription

Hi,
i need only 2 of ~10 Pro Features. Maybe it would be possible in future to select single features and pay less?
The Second thing is - mailspring promise to be a good outlook replacement, but if i bye a o365 Single subscription pay $69 / year and be able to use word,excel,outlook… 1TB Space and more… so your $85 are maybe a little bit expensive.