Change to Arcane Trickster class

[Grimojlo]

I am curently playing 5th level character.2 rogue/3wizard (Invoker)

He is going to be arcane trickster prestige class. After many negotiation

with my DM we made few changes to the existing prestige class as is writen

1 Rogue BAB (instead wizard BAB)
2 Sneak attack at lvl 1,3,5,7,9 (instead 2,4,6,8,10)
2 Tricky spells at lvl 1,3,5, (instead 3 day at 5th lvl)after that it
progress normaly.

Also he let me made few feats so he can be more effective to.

Magic Trade Of The Trickster

Prerequisites: Wizard level 1,Rogue level 1, arcane
trickster level 1

Benefit: Your levels in arcane trickster class stack with your
wizard levels. This is for purposes of determining the lvl of
your wizard arcane school powers, familiar/or/ bonded object.

Roguish Trade Of The Trickster

Prerequisites: Wizard level 1,Rogue level 1, arcane
trickster level 1

Benefit: Your levels in arcane trickster class stack with your
rogue levels. This is for purposes of determining the lvl of
rogue Trapfinding. You can also acquire
Rogue Talents at the next level of arcane trickster.

Master Trade Of The Trickster

Prerequisites: Wizard level 1,Rogue level 1, arcane
trickster level 4, Rougish Trade Of The Trickster

Benefit: You can acquire Advanced Rogue Talents
at the next level of arcane trickster.Also add d6 to your
total Sneak attack.

I am aware that this character is maybe more powerfull than it should be
with this class changes and especialy if decide to take this feats.
So whats your oppinion about all of this.

[Cheapy]

Was there any balancing factors? You said "maybe more powerful", but I'm not seeing the part that makes it a "maybe"?

[Grimojlo]

Well to be honest there aren't many balancing factors. I love to play
spellcasters. There are four of us in the game. Ranger swithc hitter,
Oracle with life mystery Sorcerer with celestial templates and I. I have played ADND since 2nd edition. Since that rules have changed in some aspect especialy for multiclassing spellcasters. The gyu who play Sorcerer
wanted to be primary spellcaster. So i let him. We need rogue and of course I wan't to try something new like prestige class. I played rogue/mage in 2nd edition with skills and powers options and such. That was just pure fun. I expect that this character will be fun either but...
I realy love versatile charaters. After reading so many post about arcane trickster we came to the conclusion thta class need some remaking. Of course he wont so good in spellcasting or as skill monkey like pure rogue.
On the other hand there are so many option available with this class. When I sad more powerfull I mean to the rest of the party. All of the characters have some unique extra abilities. Sorcerer can make dwarven runes (one for now)Oracle have some sort of the vision from time to time ect.