EGR stands for Exhaust Gas Recirculation, there is a lot of info about it and the advantages etc of fitting a blanking plat/ how to do it etc on the site
You can still just put the Blufin remap on, and it will give you a decent gain with no hassle etc
Apart from the reliability / economy benifits of DPF delete, the exhaust scavenging is improved, the DPF effectively forms a partial blockage/ restriction in the exhaust, by removing it it helps the turbo turbine spin up faster, and engine "breathing" is improved, the exhaust can be made a larger diameter, as well, and silencers replaced with "straight through" types
Because the turbine spins up quicker, the compressor spins quicker too,(has a "knock-on" effect) improving throttle response / reducing lag, so a DPF delete/ exhaust upgrade can have a greater effect than the "on paper" power/ torque increase because it can help the engine rev through the band quicker/ pick up better which can make it quicker under a light load (eg - in the lower gears) which can help make the 0-60 quicker (this won't show up on a dyno)
I don't have figures/ power increase for the difference DPF removal would make but it would be less than a remap if i had to guess i recon it might be worth 10Hp- 15Hp , a derestricted exhaust will work well with other mods remap/ bigger intercooler/ injectors turbo etc, etc
The more work done the more money required and the less the "bang for buck" / deminishing returns, eg - a remap gives a realatively large gain for realatively little money, as more and more (power) mods are done,more money has to be spent for less improvement
A good plan is to replace components with upgraded ones when they break/ wear out (eg - replace the exhaust for a better one when the old one rots off, ditch the DPF when it gives trouble, replace the DMF when, i mean if it breaks up etc) ,