Since you have just the Intel graphics, your CPU gets to do all the work. So while the i7 of same or better class may help, it will be marginally faster.
Did you change to SSD and boost the RAM too?
I use an early version of AutoCAD in my architectural practice which serves me well. Recently I purchased a 3D program, Chief Architect Home Designer Professional. After building a project, while moving between view orientations, it seems to take forever. The same is true when I initially open the program.
The HP laptop (HP ENVY x360 Convertible) OS is Win10, the processor: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz, 2201 Mhz, 2Core(s), 4 Logical Processor(s).
If I upgrade to a faster processor will that increase the speed when moving between views in the 3D program?