I (mostly) agree, but would like to point out that this is a port of the Debian port, which is not (yet) upgraded to Sage 8.0.
This upgrade seems difficult : the current "testing" sagemath can't be installed at the moment (two of its dependencies (viz python-cvxopt and python-cysignals-pari>=1.2.0+ds-2) are currently unavailable).
Furthermore, compiling from source is almost a (very large) piece of cake, provided that you follow *to* *the* *letter* the recommendations of the README and the Installation Guide ; the added benefits are the easo of installation of optional/experimental modules and the ability to patch/develop...
HTH,
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Emmanuel Charpentier