| Moonwalker |
Allow me to start by pointing out the two known facts: a) There is indeed no general ruling on what qualifies as "the attributes of a spell", but we know that b) distant spell or extended spell affect one of those attributes, namely range and duration, respectively.
Everything else is subject to interpretation. Personally, I would only include what is listed in the spell description format, i.e. school, casting time, range, area, effect, targets, duration, saving throw, and spell resistance; thus ignoring possible additions in the descriptive text, if they do not refer to one of these nine attributes. Since Paizo authors - as most people - are linguistically not particularly competent or aware of coherence, one can make an educated guess at best. The GM's experience is the best judge in most cases, and he has the last word anyway.
Lastly, it is unambiguous to me from the RAW that spellshot does in fact alter the effective range but not the range of the spell itself (nor its casting time). Hence, I would argue that this is no exclusive magic hack.