Better way of using variables in text

[Kamdroid]

It would make it so much more convinent if we could include variables in strings more easily.
Using combine behaviours is too messy, when there are nicer ways of achieving this and with just one behaviour:

For example:
"Hello there, " + [user] + ". Today is " + [current date] + "."
Or
"Hello there, {0}. Today is {1}." : [user], [current date]