Tempo continuos variation line, Dynamics continous variation & Glissandos

Hi Gang!!!

I'd really love some new features in MuseScore:

Tempo continous variation line: a separate window with a "tempo timeline" which could be changed with square points (as the tie lines) and which produces real tempo variations.

Dynamics sign (crescendo line from mf to ff, per example) which produces a real continous volumen/expression change in the final sound.

Glissando sign which produces a real glissando effect in the final sound.

And, at last, the Fermata real effect.

Am I asking too much? ???

God bless you all!!!!!!!