99.9% of EZY take-offs are flap 5, with just the occasional Flap 15 for training, in case we get stuck somewhere short. Flap 1 take-off’s were abolished last year. Our (Jeppesen) performance, in common with many others, has provision for improved climb if we need it. Again this is very rarely used.
Re the climb out, all departures are noise abatement, ie climb thrust at 1500 & accel at 3000. It may not be necessary everywhere but it is easier (and therefore perhaps safer) to have only one profile. It is also more environmentally friendly and I would bet that in 10yrs time most airports will be insisting upon it.
To slow things down further for you, we restrict ourselves to 250 below 10, unless ATC requests otherwise. This gives us a healthy margin for descent planning, reduces the risk of serious birdstrike damage, builds up hours for the F/O and is a much more gentlemanly pace for the old boy in the LHS to move around the skies.
I am surprised that you think our climb-outs are slow, perhaps our loads are better than everyone elses
But we are usually at 410 within 20mins so we can’t be that sluggish!
S & L