I have to think they will make double sure to release a quality product with Clannad, it is by far their biggest project to date and after seeing that reddit post of the Q&A with Visual Arts and Key I would think doubly so.
In case you missed it VA/Key agreed to answer the top 10 upvoted posts on Reddit and one of them asked about their thoughts on maybe making a western branch that could possibly lead to naturally ported games if not simul-releases and their response was they want to see how well the Clannad kickstarter campaign was gonna go so I’m sure Sekai knows they have some big names watching this prjoect closely.