Some feature

[atom]

i. Dummy mode

Maybe on CPUs version.

You mean --stdout? Its already supported

ii. Vocal and consonant masks

Similar requests were already made, and they were rejected saying it will drop performance.
But you can still do -1 [idontknowvocalletters] -2 [idontknowconsonantletters] ?1?2?1?2?1?2?2?1?2

Now that we have markov-chains you dont need to do such things manually any longer. Just reduce the threshold if you want faster runs.

iv. Hashcat-plus supporting all rules from Hashcat

Sounds cool. But I don't think that would be easy on atom or even possible.
I have a "cleaned" version of d3ad0ne.rule if you're interested.

That is not possible without dropping support for vector datatypes. I am sure you dont want that.

vii. Having Hashcat plus support of the feature of Hashcat

Haha, good joke.

The ones that are not ported like Table-Lookup Attack are hard to port. But I can fully understand your wish for that