Cleanup api formatting code in v3

I'm probably more bothered by things like

$formatError = _civicrm_api3_contribute_formatted_param( $paramValues, $formatted, true);

If formatting needs to be done it should be handled /supported within the api function – civicrm_api('contribution', 'create', $params) — or by the calling function but not by directly calling an api util function (I actually thought I'd removed _civicrm_api3_contribute_formatted_param but I guess I hadn't yet - pretty sure I'd been hacking away at the other function on in the contribute file which mostly duplicates it and is called from the api).

I realise the press it to get 4.1 out but I think it would be better to ship with core calling api v2 than to switch to apiv3 without doing it in a way that is consistent with the effort we put into establishing api3. Can we do it slowly & properly rather than in a mad rush that implements v3 in name only?