Many great milers and 800m runners do training runs such as that because they have run 3:58 or faster or 1:46 or faster. Judging from your mile PR and your other longer efforts, 6:00 is neither a recovery effort or a regular aerobic effort. It would seem to fall in line with a steady state run which is what I assume you mean by "steady effort", but it seems like you are sort of throwing darts at a board. You have quite a few weeks with 2-3 tempo efforts in the same exact week. Just going back 1 page I see 2 tempo efforts back to back. Did you do this because "you felt good"? You realize that most runners feel good everyday running, right? But that doesn't mean you just go faster all the time. I'm finding it difficult to parse your training logs and determine what the goal is for each of your runs. It seems like you often just go out the door and end up dropping the pace because you feel good. This might make sense in the short term to someone running for fun, but it doesn't add up in long term training. You're pushing too hard too often even if its what you think is a "moderate" effort.
Also, I only see a few tempos in the 5:30s-5:40s which is equally perplexing. How did you run a 5:05 pace 5K when you have almost never touched that pace except for the rare interval effort here and there. You didn't do any mile repeats at this pace which would be your goal 5K pace and none of your tempos would suggest that 5K split, yet you claim that you are weaker over longer distances? You also say you ran a 2:42 1K but felt like you could go much faster? Do you have the link to the results of this race?
A few examples:
Week Ending in 12/2
Sunday 10 miles @ 6:11 pace on the treadmill. Cut down the first 3 miles then ran at 6:00 pace the rest of the run.
*Why were you doing 10 miles at 6:11 pace? You did a 10 mile steady state run? For what purpose?
Week ending in 10/21
Thursday 3min on, 2.5min off, 2.5min on, 2min off, 2min on, etc down to 30 seconds.
3min: 5:26 pace
2.5min: 5:25 pace
2min: 5:10 pace
1.5min: 5:03 pace
1min: 5:06 pace
0.5min: 4:48 pace
Felt decent. Rest were jogs at 8min pace. ran a 900m loop around a block.
*This is one of the only workouts I can find where you actually were near your 5K pace you said you ran.
Week Ending in 11/11
Monday 9.2 miles (6:44). Felt decent.
Tuesday Light Progression. 8 miles (6:20). Last few miles 6:00 pace. Treadmill. Light lifting and core after
Wednesday 8.6 miles (7:35). Partially on trails.
Thursday Long Run. 14 miles (6:47). Last few miles ~6:15 pace uphill. No pressing, felt good.
*You did 3 efforts faster than easy or recovery pace in the span of 4 days and 1 was a long run, why? You taxed the same system in a span of 4 days. I am starting to see a trend of you saying you are "tired" on many of your runs. Why do you think that is?
Week Ending in 11/18
Tuesday 6x1k @ CV pace with 200m jog rest. 4x150m after.
3:25, 3:24, 3:22, 3:23, 3:22, 3:17
20.1, 20.0, 19.9, 20.2
*You did 1Ks at Tinman's CV pace, what some would call "pseudoscience pace"? These are at 5:28-5:17 pace?
^ This is one of the only times you've cracked 2:40 for 800m, yet 1 week after this you run 5:05 pace for a 5K and then a week after that you run 4:53 pace for a 3K and a 2:42 for a 1K. You literally haven't done any 800 or 1K repeats at paces that are in line with a 1:56 800m runner and I would maybe say not even a 1:58 800m runner. If we take your word that you've run 49. in the 400m and 1:52.7 in the 800m, I am having trouble understanding your workouts. Even if you are 5-6 months out of competing, you would still be doing 800, 1Ks, and tempos at faster paces than what you've been running. Assuming your 1:58 shape was not due to weight gain or something, getting back down to faster 800s, 1Ks, and tempos should be very easy and happen within 1-3 months. Yet, your paces have hardly increased. Are you just planning on hammering the track for 3 months straight or something?
Please convince me...