As the title states, in this request I wish for Ichigo to acquire his true Shikai instead of his false one when he gains Shikai. The same goes for when he gains Bankai; it will be his true Bankai rather than his false one. I want him to injure Aizen greatly during his betrayal, and I want Kisuke to have a different plan for the Hogyoku as well. This time around his idea will be to hide it away in his shop, but to give it to Ichigo some day if necessary, which it will be during TYBW. Ichigo will proceed to go through the usual battles, but they'll be easier for him. The only difficulty he'll have is with controlling his spiritual energy and power. Ichigo will not need the Final Getsuga Tensho to defeat Aizen, especially since he won't have Kisuke's hogyoku. (He'll still have his own.) Aizen will also die rather than be captured by kido, and his hogyoku will be taken by Kisuke to be merged with the other hogyoku. The fullbringer arc will still happen, but Ichigo will defeat them easily and also keep his fullbring.
Once we get to TYBW, Yhwach will already know of Ichigo's true capabilities, and will prepare countermeasures. Due to this, Kisuke gives Ichigo the hogyoku to give him back the aspect of surprise. Aizen won't be too much help in this arc, since he'll be dead, but you could have the hogyoku give Ichigo some of Aizen's abilities if you wish, and have the hogyoku be turned into another zanpukato spirit of Ichigo's. Once done with all arcs, either end there, or ignore the epilogue, and crossover into the world of Highschool DxD.