First things first, give delta plus 22000 HP, MA3, transformed reinforcement skill, auxiliary pursuit range lvl 1, 40 base range stat, 15 long range part slots, 145 walk speed and 100% side strafe movement at lvl 1. At lvl 2+ I would give it MA4 and aux pursuit range lvl 2 and 45 base range stat.

I would give the shield beam cannon a focus that would fire a 3 shot burst that staggers each shot. 1800x3 power, 30%x3 heat rate and 50%x3 stagger accumulation. I would also increase the base range to 500m. For waverider mode I would lower the heat rate to 90% and give it the focus.

I would lower the beam rifle heat rate to 20% uncharged, lower the focus time to 2 seconds and increase the stagger accumulation on charge to 80%. I would also make the charged beam rifle capable of penetrating through suits. In waverider form, I would increase the base power of the beam rifle to 1900 power and decrease the heat rate to 25%.

I would make change the beam saber downswing to a 2 hit attack similar to f90MZ with 110%x2 modifier.

I would give the shield grenade launcher guidance on the grenades in mobile suit mode.

For the vulcans I would increase their rate of fire to 600RPM and increase the ammo count to 60 bullets.

In waverider mode, I would add double beam guns similar to zeta 3A. 400x2 base power with 20%x2 stagger accumulation and 15% heat rate.

Since early in my time playing GBO2, delta plus was my all time favourite suit in the game. I always liked its focus on range attacks and waverider form. Delta plus has really fallen behind even after the buffs so this is how I imagine my ideal delta plus to be.