DM needing advice for PC Sorcerer creation / bending rules but keeping balance

[Average Joe 23]

Thanks for reading. I'm a DM that likes to work with my players to help them create characters they are passionate to play. I'm willing to bend the rules, but also like to keep balance. This player is creating a sorcerer, and has lots of 3.5 experience, but no Pathfinder experience.

In the 3.5 PHB II regarding sorcerers, there is an option allowing them to lose familiar and gain Rapid Casting (no extra casting time for metamagics). The closest Pathfinder equivalent I can find is the arcane bloodline, which at 1st level provides arcane bond, and at 3rd level Metamagic Adept (similar to rapid casting, but only usable a certain number of times per day).

I'm willing to compromise, and allow them to take the arcane bloodline, forego the arcane bond and instead use Metamagic Adept more times than they would otherwise be allowed. The question is:

How much more? I'm tempted to allow them to do so unlimitedly, but wonder if this might prove very unbalancing. Perhaps a better compromise would be to double or triple the allowed per-day usage.

Thoughts or comments? Thanks for your input.

[Cheapy]

Charisma modifier times per day? Could get obscene at high levels, but eh...

[Abraham spalding]

Currently at 20th level the arcane bloodline is already unlimited on that ability.

Spontaneous Metafocus allows a spontaneous caster to apply any metamagic feat he has to a spell without adjusting it's casting time.

Personally I don't think this is hugely game breaking -- especially since it's a power that really isn't useful until 4th level for a sorcerer and even then requires him to spend feats in addition to the spell slots to actually use the class feature at all.

I would suggest the following:

Quote:

Metamagic Adept -- at first level you gain a bonus metamagic feat. When using that feat you do not adjust the casting time of the spell you cast. At level 7 and 11 you gain another bonus metamagic feat you can use this ability with. At level 20 you may use this ability with any metamagic feat you have.

That way it's limited to a specific and limited number of metamagic feats instead of just any of them when he is lower level but he still gains the same final power if he gets to level 20.