I have regularly been given high speed flight plans and I have been asked to slow down
Likewise...so maybe just saving fuel isn't the company's goal 100% of the time..
We don't know what a hotel room around the airport will cost.
But I know a man who does ....certainly around one of the London airports even at a "bulk" rate it soon adds and if you are dealing with a group missing a conection it pretty quickly wipes out that 300 kg of fuel you saved over 10 or more hours..
I wouldn't advocate running around with the leading edges glowing, and a combination of flying the plan whilst also trying to fit in with whatever arrival pucntuality SOP your company has seems fair..