It would be very nice to have multi-line @param descriptions (as well as others) 
auto-formatting support for indentation like:

/**
 * Method description.
 *
 * Longer method description which is in multiple lines
 * but there is no need for indentations here.
 *
 * @param param1 description text follows and follows
 *   and follows to more than one line but with short
 *   (2 spaces) indent relative to '@param'
 * @param param2 another description but short
 * @param param3 another very long parameter description
 *   in multiple lines
 *
 * @throws SomeException which has also long description
 *   which follows in more than one line
 */

I keep such style which is shorter and still clear comparing to empty line separating individual parameters. (For now I'm forced to disable comments formatting).