Womble - a very interesting question and informative replies from Olman, Didds and Coach Klien.
I am a Match Observer at L5 in SW Group and also a L2 Coach (I only do some specific kicking and tactical awareness pre-season work with my L9 club's half-backs).
Over the last few seasons I have seen a wide range of coaching abilities, awareness and styles at L5.
The DoR's and Head Coaches are usually older & experienced, with the newer coaches brought in as forwards or backs specialists to learn their trade. The best combination has been at Bournemouth with RFU Level 4 DoR Dave Dunn and Coach Tim Collier (ex-Premiership player), and Jason & his team at Chinnor developed a good side. We will see how both clubs do at L4 next sesaon after their promotion. Even relegated Newbury had good coaching support for a young inexperienced team and club with no resources to use to gain playing strength & experience.
What I have noticed with clubs at L5 is that the coaches mostly establish a game plan and style based on the squad and key players they have, and their perceived place in the pecking order, or season history to date, determining each match's general tactics. With specific (and talented playmakers) at half backs, flanker, centre or full back some clubs will play off the cuff, or adopt a Plan B, but mainly I see a lot of repetitive structure and phases rolled out each week, with most sides risk averse and defence focussed.
The main discussion areas I have post match with coaches are the referee's management of the breakdown (where 50% + of PKs occur each week), management of offside lines at ruck & maul, management of scrums (where that coach may perceive his stronger pack was dis-advantaged) and application of advantage (open-mouthed at your half-time coach's comments !).
One of the issues we all face is that the Elite Game (now including Championship) is different to the Community one, especially L5 downwards. Ex-Premiership players becoming lower level coaches will quickly discover that their players are just not equipped physically, nor in rugby awareness, nor with personal / unit skills derived from a full-time porofessional player's routine.
I played L6-8 for my home town club in my late 30s with two high quality coaches (Alistair McHarg and Owen Jarrett) who turned a L8 side into a L6 one. Two of us had played 'first class' and so made on-pitch tactical choices when necessary but mainly the success was built on a clear structure, asking the players to do what they were capable of, and making sure defensive drills were tight. Having Margot Wells as our fitness coach helped a lot too, ensuring we played all 80 minutes - at those levels too many sides are not fit enough to do that and so ta score or two in the last ten minutes were common, or we could close out a match defensively as physically we could cope.
With the coming together of Coaching and Refereeing Depts into a single Develoment Department at RFU, hopefully we will see better integration between Coaches and Match Officials, as we both need to learn from each other.