Ironically, I didn't want a reboot until after the reboot happened.
I do agree with the sentiment however, that Castlevania shouldn't belong to one person or group who dictate everything. Never mind the recent revelation that MercurySteam members had to be informed about the series before they started working on the reboot, but aside from that Lords of Shadow may have paved way for more interesting directions for the series in its own misguided sort of way.
IGA was a good producer, very respectful and knowledgeable, but he wasn't perfect either. Castlevania did get stuck in somewhat of a tunnel vision because he adhered to his own preferred formula he established with Symphony of the Night. It was a very interesting take, and I'm probably coming across more negative than I intend to, but I'm my personal opinion I dislike how IGA only sticked to his own ideal "vision" at the expanse of elements that the older games used to have, and how he sometimes tried to overwrite old games to fit his own ideas.
Like for example, I heavily dislike how he changed Maria's personality in Dracula X Chronicles. Everything she says is hilarious in the original Rondo of Blood script, but that was heavily toned down in the new script, to fit the more moody tone from SotN, basically missing the point of what made her such a great character.
This isn't problematic in itself, but I think it is in combination with the amount of time he spend in charge of the series. In a way you could argue he "hijacked" the series for a while (probably too strong of a word, though). Don't suddenly think I hate IGA now though, lol.
Which brings me to my point, the series is at its best when many creative minds get a change to work on it. That's what gave us SCIV, that's what gave us Rondo, that's what gave us SotN, etc. Also, The Arcade was something IGA didn't really work on, and in my opinion one of the best things to come out of the series in years. I really hope the series will return to that line of thought in the future.