Sure it will cost less, but it also won't provide the syndication value of the complete series down the road. In the long term the HD syndication will cover the costs to remaster it, but it just isn't a high priority to have just yet. CBS has been preparing for this with all they are doing now, but the reality is SD channels still out number HD channels. The closer we get to reversing that the more CBS/Paramount will reap the benefits of all this upfront cost. But that time just isn't here yet. And there is a very good possiblility that the cost to redoing these types of SFX will come down some in 5 years. Compared to the other remastering work being done for other series, TNG is a major increase in cost, more even than TOS.