I haven't read all the responses, so apologies if I'm doubling up...
The Watch Tower Society has already been focussing less on 1914. It is still a core dotrine and their claim of authority falls apart without it, but they don't talk about it as much. In the last couple of decades, they've put less focus on October of 1914. Additionally, there has been less focus on 1914 in general. The following table shows the average number of times per month that The Watchtower has mentioned 1914 per decade. (Some instances are not directly related to JW theology, but incidental references to 1914 are infrequent.)
| Decade | Average |
| 50s | 90 |
| 60s | 90 |
| 70s | 60 |
| 80s | 83 |
| 90s | 49 |
| 00s | 22 |
| 10s | 12 |
Since the introduction of The Watchtower Study Edition in 2008, the Public Edition has only mentioned 1914 four times (five counting an entirely incidental appearance), and never with any reference to 607. Similarly, there has been a significant reduction in discussion of 1914 in the context of 607 in general. The following table shows the number of occurences of 1914 and 607 appearing in the same paragraph.
| Decade | Occurences |
| 50s | 98 |
| 60s | 89 |
| 70s | 74 |
| 80s | 45 |
| 90s | 18 |
| 00s | 21 |
| 10s | 0 |
There are two main reasons for this. Firstly, most of the people who were alive in 1914 are dead, and this is the same reason for the ridiculously implausible 2010 redefinition of "generation". Secondly, prior to the Internet era, it was much simpler to simply pass off 607 as if it were fact, because it took a little more effort to verify, and the average 'faithful' JW wouldn't bother. Now, it is a much easier task for even the laziest researcher to confirm that there is no evidence in support of 607, and therefore of 1914. It is therefore simpler to avoid mentioning the elephant in the room. (Even in their most recent, and easily refuted, attempt at defending their 607 doctrine, they don't mention 1914 at all.)
There is still an appendix specifically dealing with 1914 in the Bible Teach book, which may seem counter-intuitive to the idea that they are putting less focus on 1914. However, the usual setting for considering that material is when a JW is trying to convince a prospective new member of JW beliefs, and its presence in that situation serves to reinforce the belief in their own mind. Additionally, 'weaker' JWs, who might otherwise be more likely to try to verify the information, are less likely to be conducting Bible studies, and therefore less likely to consider the material.
