Nowhere said:
The only part of True Sorcery I have an issue with is the lengthy casting times; I'm a fan of fast-paced, cinematic magic and was wondering if there were alternatives to shorten the time of lower level effects to a full round or standard action.
Yep, it's easy, there's two ways to do it, and they're both already right there in the rules...
First, just make sure that the total DC of the spell is low enough, and your Spellcraft bonus is high enough.
A 3rd level Spellcaster with an 18 Intelligence can have a Spellcraft skill of +10. With Skill Focus and Magical Aptitude as feats, it goes up to +15. Add in Spell Focus and Greater Spell Focus, you can boost it up to +18 for a single Talent. Any Spellcaster, regardless of race, can have all four of those feats by 3rd level.
So, this particular Spellcaster can cast effects with a DC of 15 (18 for a single Talent) or less
as a swift action, DCs of 16-20 (19-23) as a standard action, and DCs of 21-25 (24-28) as a full-round action (or two standard actions). That's not too shabby. All of the easiest effects that emulate low-level spells like shocking grasp and burning hands will cast very quickly.
In addition, you can still prepare a handful of spells ahead of time to cast as a standard action (pages 17 & 18 in TS)...
PREPARATION
At your option,you may prepare one or more spell effects ahead of time to cast more quickly later. To prepare a spell effect in advance, you must spend the appropriate number of actions casting, except for the very last action. Thereafter, the effect is stored in your mind, and you may complete the effect by spending 1 standard action to finish the casting. Preparing spell effects ahead of time necessarily prevents you from casting them as quickened actions.
Storing spell effects is not foolproof. For as long as you store the effect, you must consciously keep the spell effect in mind. If you lose consciousness, you lose all of the stored effects. You may store a maximum number of effects equal to your Intelligence bonus. If you don’t have an Intelligence bonus, you cannot prepare spells head of time.
That means our 3rd-level, 16 Int Spellcaster can stash away three of his biggest spells to use at a moment's notice.
There really isn't any need to mess with this particular rule in TS.