Well, the Beholder pack is going to be pretty rare - on par with the From the Vaults from Magic, so you might be disappointed if you're not on the ball this time around. We running that delicate balance of trying to get it into a lot of people's hands while making it a must have/slightly hard to find item.
Just for gathering info and random speculation - what would people feel about a slightly less rare pack once a year? Like an orc pack one year, an undead pack the next, etc. In my mind this would be alongside the yearly randomly packed release. A lot of us have a crap-ton of minis already, but would you be interested in some of these more mundane packs?
ABSOLUTELY. I'm a reborn D&D'er, DM'ing after a 20 year layoff. I've bought a couple hundred mostly cheaper mini's this year all by the single on the 2nd hand market. This indirectly helps WotC. For the amount I spent, if I were to have bought the boosters I would've ended up with so little of what I needed compared to what I ended up getting.
Now that I have most of my essentials filled, I will buy one or two of most new boosters just for the fun factor. However, it just isn't too cost effective to buy the boosters. While I did buy Icingdeath on the 2nd hand market, most specialty minis like the beholders set are just far too costly to be practical. Fun and cool, yes, but unpractical.
However, if WotC put together a yearly theme set, much more common than the beholders, this would certainly be considered by me. If my budget were limited, I would likely buy this set before any booster. For example, an Orc set that presented the Orcs from a single tribe would be awesome, with one leader/sorcerer, one leader/fighter, 1 archer, 1 spy/thief, four grunts. Undead, goblins, drow, elf tribe, city guards, paladin temple knights, etc. I'd probably need the minis, and if not, if they were cool and a collective tribe/group, I'd certainly find a fun way to add it to one of my campaigns.
... side note here, imo the Player Handbook Heroes packs are generally much less usable/interesting and poorer designed than the PC minis of the earlier sets. I haven't seen other people mention this, but do you all agree?