Ad44 don't you mean an extra £2.50 a month.
Your option sounds like TV Entertainment £7.50 a month plus Kids Bolt on £3 month
Your new option would be Entertainment plus £10 a month plus the kids bolt on £3 month
So you would pay £2.50 a month more but get 5 extra channels and TV everywhere (allowing you to watch TV on the go)
BUT as pointed out you can just stay on what you have if you are happy with that....
Last years price increases took the price of TV Entertainment up from £7 to £7.45 a month so with the Kids bolt on (£3) that gives ad44 a total of £10.45. Since January the BT Tariff guide has been showing the base price for TV Entertainment to be £7.50 (presumably that applied to new sales)
I think compared to Sky BT offer good value TV at a good low price. With every pay TV provider there will always be channels you want that they may not offer and there will always be one or two channels that you may never watch or only watch once in a while.
With BT there is always room for more minor improvements to there TV service but at lest they seem to have made a start.