Boring? You think it is interesting subbing out Soriano with Mark Belllhorn on an off-day? To each his own. Having 10 or 12 owners subbing in scrubs daily is nonsense adding no appreciable net value to a league over a weekly format. Everyone plays 162 games at each position...every player gets days off and every own deals with the same issues on his roster...it all washes out. If you think that more value is added in setting in a few scrubs for a handful of days off, more power to you. I have played both and do not see this as a meaningful use of my time beyond the fact that I have to do it because EVERYONE ELSE is doing it under the rules as written.
As for injuries, if a player gets hurt, you miss all of 4 games on avg before the roster period switches and you can pick up a replacement off the wire anytime. You do not have to wait til the next period to do so. You miss all of 4 games on avg and every owner in the league is subject to the same situation when they lose a player during a week.. Again, those 4 days on avg that Bellhorm will give you gong to mean that much in that light?
And weekly leagues are as wire intensive as any other league. Just because the next scoring period does not start til next week does not mean you are not looking for a pickup during the week. People are on all the time.
I find that those who strongly like daily usually do so because they are not satisfied unless they make a few moves a day even if they are meaningless position switches and nonsensical 1 day pickups. It makes them feel like they are doing something. Otherwise, it is much ado about nothing, imo.