The deletion of a statement regarding use or intended purpose in an independent product claim fulfils the requirements of Art. 123(2) only if the application as filed offers a basis for the assumption that the product can also be used in some other way (and if the statement of purpose does not amount to a functional limitation).
The broadening of a claim by exchanging a particular feature for a more general feature cannot be based on an indication that it would be obvious for a skilled person (see also H‑V, 3.2.1).
Moreover, since in these cases the deletion of a particular feature or its replacement by a more general feature of features usually leads to the broadening of the claim. Therefore, the requirements of Art. 123(3) are not fulfilled.