EE BT broadband slow down

 My broadband is on a go slow slow since BT took over EE. It was a respectable 10.5 Mbs for 3 years but its now for no reason at all gone down to 7.5 Mbs. Im not the only one to noticing a slow down with EE. Being a phone / broadband engineer I've checked my wiring and other peoples to make sure its ok. I rang EE who said “its within my expected range” and “ no they have not slowed it down” .
Coincidence ? Or have I been "tapered" If your kids are hamering your B/B the service provider will sometime turn down the tap on your hosepipe sighting the "fair use" policy.
Its most likely a ploy to get us to sign up for more expensive fibre optic broadband.