I have considered this (and still am), but I am not sure whether I want to go that far as it would make the whole rating system quite transparent. But more filters are definitely on the list (including specific airlines), which should already go a long way towards figuring out the competition.
In my mind, the ORS (or rather: DS) interface will look a lot more like, say, Google Flights, in that it presents results in a similar way and at a similar level of detail. This commonly includes stuff like seats, in-flight entertainment options, the general level of food/beverage service etc.
They aren’t going anywhere. The first iteration will factor them in in a somewhat simplistic way, but the goal is to add more criteria, not removing existing ones. That said, some aspects might fit better with the Brand and Image ideas on the roadmap.
This likely won’t be a part of Individual Travel Requests as such, but ideas in the general direction are part of the whole “DS subject area” (example).
Not really. Individual Travel Requests already employ the DS internally, but the raw connections are still generated on a per-airport basis (hence the “bulk” in "Individual Travel Request Generation (bulk)") by the good old ORS. So in principle, IL works just as it used to. What happens then is that the DS sorts these raw connections in “neutral order”, then generates so-called “availabilities” for them, which it finally matches to fares. Availabilities are currently based on the 3 fixed service classes we have rather than dynamic inventories . The fares are “faked” by summing up the per-leg prices. Anyway, at the end of that process you have availabilities with fares in neutral order, which are then individually rated and sorted for each travel request. The best match(es) is/are then booked for that particular request. Does that answer your question? 
They will definitely overlap. It’s just that within a given market segment (say, “business travel”), there are a bunch of sub-segments with different general preferences. Just because you travel for business doesn’t mean you have unlimited budget, so there might be a general business travel type that values a lower price over traditional “business class perks” and as such would happily fly Economy. At the other end of the spectrum there might be an “executive type” who really values comfort and speed above anything else and will happily fly First Class if available. But both will book whatever business class flight is available (and they can afford) if the market doesn’t offer a lot of choice.
Yes and no. Booking classes and Individual Travel Requests are different sides of the same coin, I guess. But they don’t necessarily depend on each other. The (current) service attributes of a flight are very much physical (think seats and service profiles) while booking classes are merely a “virtual” concept that allows more fine-grained control over capacities and fares. The latter - fares - is actually going to have a lot more impact here as it will allow to introduce more “virtual” attributes like, for example, rules for cancellations or baggage allowances which are often the critical (and currently missing) factors deciding whether a traveller will book a given itinerary or not. Long story short, Individual Travel Requests will work just fine with our current set of product attributes. Ideally, it’ll end up leading to more different types of airlines competing for different market segments.